Here is a list of some of the more common terms you may come across
when using your computer:
-
- ADN -- (Advanced Digital Network)
- Usually refers to a 56Kbps
leased-line.
-
- ADSL -- (Asymmetric Digital Subscriber Line)
- A DSL line
where the upload speed is different from the download speed. Usually
the download speed is much greater.
- Applet
- A small Java
program that can be embedded in an HTML page. Applets differ
from full-fledged Java applications in that they are not allowed to
access certain resources on the local computer, such as files and
serial devices (modems, printers, etc.), and are prohibited from
communicating with most other computers across a network. The common
rule is that an applet can only make an Internet connection to the
computer from which the applet was sent.
- Application Server
-
Server software that manages one or more other pieces of
software in a way that makes the managed software available over a
network, usually to a Web server. By having a piece of
software manage other software packages it is possible to use
resources like memory and database access more efficiently than if
each of the managed packages responded directly to requests.
-
- ASCII -- (American Standard Code for Information
Interchange)
- This is the defacto
world-wide standard for the code numbers used by computers to
represent all the upper and lower-case Latin letters, numbers,
punctuation, etc. There are 128 standard ASCII codes each of which
can be represented by a 7 digit binary number: 0000000 through
1111111.
- ASP -- (Application Service Provider)
- A organization (usually
a business) that runs one or more applications on their own servers
and provides (usually for a fee) access to others. Common examples
of services provided this way include web-based software such as
Calendar systems, Human Resources tools (timesheets, benefits,
etc.), and various applications to help groups collaborate on
projects.
-
- Backbone
- A high-speed line
or series of connections that forms a major pathway within a
network. The term is relative as a backbone in a small network
will likely be much smaller than many non-backbone lines in a large
network.
- Bandwidth
- How much stuff
you can send through a connection. Usually measured in
bits-per-second (bps.) A full page of English text is about
16,000 bits. A fast modem can move about 57,000 bits in one second.
Full-motion full-screen video would require roughly 10,000,000
bits-per-second, depending on compression.
-
- Baud
- In common usage the
baud rate of a modem is how many bits it can send or
receive per second. Technically, baud is the number of times per
second that the carrier signal shifts value - for example a 1200
bit-per-second modem actually runs at 300 baud, but it moves 4 bits
per baud (4 x 300= 1200 bits per second).
-
- BBS -- (Bulletin Board System)
- A computerized meeting
and announcement system that allows people to carry on discussions,
upload and download files, and make announcements without the people
being connected to the computer at the same time. In the early
1990's there were many thousands (millions?) of BBS's around the
world, most were very small, running on a single IBM clone PC with 1
or 2 phone lines. Some were very large and the line between a BBS
and a system like AOL gets crossed at some point, but it is not
clearly drawn.
- Binary
- Information
consisting entirely of ones and zeros. Also, commonly used to refer
to files that are not simply text files, e.g. images.
- Binhex -- (BINary HEXadecimal)
- A method for
converting non-text files (non-ASCII) into ASCII. This is
needed because Internet e-mail can only handle ASCII.
- Bit -- (Binary DigIT)
- A single digit number
in base-2, in other words, either a 1 or a zero. The smallest unit
of computerized data. Bandwidthis usually measured in
bits-per-second.
-
- BITNET -- (Because It's Time NETwork (or Because It's
There NETwork))
- A network of
educational sites separate from the Internet, but e-mail is freely
exchanged between BITNET and the Internet. Listservs®,
a popular form of e-mail discussion groups, originated on BITNET. At
its peak (the late 1980's and early 1990's) BITNET machines were
usually mainframes, often running IBM's MVS operating system. BITNET
is probably the only international network that is shrinking.
- Blog -- (weB LOG)
- A blog is basically a
journal that is available on the web. The activity of
updating a blog is "blogging" and someone who keeps a blog is a
"blogger." Blogs are typically updated daily using software that
allows people with little or no technical background to update and
maintain the blog.
Postings on a blog are almost always arranged in chronological order
with the most recent additions featured most prominently.
It is common for blogs to be available as RSS feeds.
-
- Blogosphere or Blogsphere
-
The current state of all information available on blogs
and/or the sub-culture of those who create and use blogs.
- bps -- (Bits-Per-Second)
- A measurement of how
fast data is moved from one place to another. A 56K modem can
move about 57,000 bits per second.
- Broadband
- Generally refers
to connections to the Internet with much greater bandwidth
than you can get with a modem. There is no specific
definition of the speed of a "broadband" connection but in general
any Internet connection using DSL or a via Cable-TV may be
considered a broadband connection.
-
- Browser
- A Client
program (software) that is used to look at various kinds of Internet
resources.
- BTW -- (By The Way)
- A shorthand appended to
a comment written in an online forum.
- Byte
- A set of Bits that
represent a single character. Usually there are 8 Bits in a Byte,
sometimes more, depending on how the measurement is being made.
-
- Certificate Authority
- An
issuer of Security Certificates used in SSL
connections.
- CGI -- (Common Gateway Interface)
- A set of rules that
describe how a Web Server communicates with another
piece of software on the same machine, and how the other piece of
software (the ?CGI program?) talks to the web server. Any piece of
software can be a CGI program if it handles input and output
according to the CGI standard.
-
- Client
- A software program
that is used to contact and obtain data from a Server
software program on another computer, often across a great distance.
EachClient program is designed to work with one or more
specific kinds of Server programs, and each Server
requires a specific kind of Client. A Web Browser is a
specific kind of Client.
- co-location
- Most often used
to refer to having a server that belongs to one person or
group physically located on an Internet-connected network
that belongs to another person or group. Usually this is done
because the server owner wants their machine to be on a high-speed
Internet connection and/or they do not want the security risks of
having the server on thier own network.
-
- Cookie
- The most common
meaning of "Cookie" on the Internet refers to a piece of information
sent by a Web Server to a Web Browser that the Browser
software is expected to save and to send back to the Server whenever
the browser makes additional requests from the Server.
Depending on the type of Cookie used, and the Browsers' settings,
the Browser may accept or not accept the Cookie, and may save the
Cookie for either a short time or a long time.
Cookies might contain information such as login or registration
information, online "shopping cart" information, user preferences,
etc.
When a Server receives a request from a Browser that includes a
Cookie, the Server is able to use the information stored in the
Cookie. For example, the Server might customize what is sent back to
the user, or keep a log of particular users' requests.
Cookies are usually set to expire after a predetermined amount of
time and are usually saved in memory until the Browser software is
closed down, at which time they may be saved to disk if their
"expire time" has not been reached.
Cookies do not read your hard drive and send your life story to
the CIA, but they can be used to gather more information about a
user than would be possible without them.
See also:
Browser, Server
- CSS -- (Cascading Style Sheet)
- A standard for
specifying the appearance of text and other elements. CSS was
developed for use with HTML in Web pages but is also
used in other situations, notably in applications built using
XPFE. CSS is typically used to provide a single "library" of
styles that are used over and over throughout a large number of
related documents, as in a web site. A CSS file might specify that
all numbered lists are to appear in italics. By changing that
single specification the look of a large number of documents can be
easily changed.
See also:
HTML,
Web page,
XPFE
- Cyberpunk
- Cyberpunk was
originally a cultural sub-genre of science fiction taking place in a
not-so-distant, dystopian, over-industrialized society. The term
grew out of the work of William Gibson and Bruce Sterling and has
evolved into a cultural label encompassing many different kinds of
human, machine, and punk attitudes. It includes clothing and
lifestyle choices as well.
See also:
Cyberspace
- Cyberspace
- Term originated
by author William Gibson in his novel Neuromancer the word
Cyberspace is currently used to describe the whole range of
information resources available through computer networks.
See also:
Cyberpunk
- Back to Index
-
- DHCP -- (Dynamic Host Configuration Protocol)
- DHCP is a protocol
by which a machine can obtain an IP number (and other network
configuration information) from a server on the local
network.
See also:
IP Number,
Network,
Server
- DHTML -- (Dynamic HyperText Markup Language)
- DHTML refers to
web pages that use a combination of HTML, JavaScript,
and CSS to create features such as letting the user drag
items around on the web page, some simple kinds of animation, and
many more.
See also:
CSS,
HTML,
JavaScript,
Web page
- Digerati
- The digital
version of literati, it is a reference to a vague cloud of people
seen to be knowledgeable, hip, or otherwise in-the-know in regardsto
the digital revolution.
- DNS -- (Domain Name System)
- The Domain Name System
is the system that translates Internet domain names into
IP numbers. A "DNS Server" is a server that performs this
kind of translation.
See also:
Domain Name,
IP Number,
Server
- Domain Name
- The unique name
that identifies an Internet site. Domain Names always have 2 or more
parts, separated by dots. The part on the left is the most specific,
and the part on the right is the most general. A given machine may
have more than one Domain Name but a given Domain Name points to
only one machine. For example, the domain names:
matisse.net
mail.matisse.net
workshop.matisse.net
can all refer to the same machine, but each domain name can refer to
no more than one machine.
Usually, all of the machines on a given Network will have the
same thing as the right-hand portion of their Domain Names
(matisse.net in the examples above). It is also possible for a
Domain Name to exist but not be connected to an actual machine. This
is often done so that a group or business can have an Internet
e-mail address without having to establish a real Internet site. In
these cases, some real Internet machine must handle the mail on
behalf of the listed Domain Name.
See also:
IP Number,
TLD
- Download
- Transferring data
(usually a file) from a another computer to the computer you are are
using. The opposite of upload.
See also:
Upload
- DSL -- (Digital Subscriber Line)
- A method for moving
data over regular phone lines. A DSL circuit is much faster than a
regular phone connection, and the wires coming into the subscriber's
premises are the same (copper) wires used for regular phone service.
A DSL circuit must be configured to connect two specific locations,
similar to a leased line (howeverr a DSL circuit is not a leased
line.
A common configuration of DSL allows downloads at speeds of up to
1.544 megabits (not megabytes) per second, and uploads at speeds of
128 kilobits per second. This arrangement is called ADSL:
Asymmetric Digital Subscriber Line.
Another common configuration is symmetrical: 384 Kilobits per
second in both directions.
In theory ADSL allows download speeds of up to 9 megabits per
second and upload speeds of up to 640 kilobits per second.
DSL is now a popular alternative to Leased Lines and ISDN, being
faster than ISDN and less costly than traditional Leased Lines.
See also:
ADSL,
Bandwidth,
ISDN,
Leased Line,
SDSL
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-
- Email -- (Electronic Mail)
- Messages, usually
text, sent from one person to another via computer. E-mail can also
be sent automatically to a large number of addresses.
See also:
Listserv ®,
SMTP
- Ethernet
- A very common
method of networking computers in a LAN.
There is more than one type of Ethernet. By 2001 the standard
type was "100-BaseT" which can handle up to about 100,000,000
bits-per-second and can be used with almost any kind of computer.
See also:
Bandwidth,
FDDI,
LAN
- Extranet
- An intranet
that is accesible to computers that are not physically part of a
companys' own private network, but that is not accessible to
the general public, for example to allow vendors and business
partners to access a company web site.
Often an intranet will make use of a Virtual Private Network. (VPN.)
See also:
Intranet,
Network,
VPN
- Back to Index
-
- FAQ -- (Frequently Asked Questions)
- FAQs are documents that
list and answerthe most common questions on a particular subject.
There are hundreds of FAQs on subjects as diverse as Pet Grooming
and Cryptography. FAQs are usually written by people who have tired
of answering the same question over and over.
- FDDI -- (Fiber Distributed Data Interface)
- A standard for
transmitting data on optical fiber cables at a rate of around
100,000,000 bits-per-second (10 times as fast as 10-BaseTEthernet,
about twice as fast as T-3).
See also:
Ethernet,
T-3
- Finger
- An Internet software
tool for locating people on other Internet sites. Finger is also
sometimes used to give access to non-personal information, but the
most common use is to see if a person has an account at a particular
Internet site. Many sites do not allow incoming Finger requests, but
many do.
- Fire Wall
- A combination of
hardware and software that separates a Network into two or
more parts for security purposes.
See also:
Network
- Flame
- Originally, "flame"
meant to carry forth in a passionate manner in the spirit of
honorable debate. Flames most often involved the use of flowery
language and flaming well was an art form. More recently flame has
come to refer to any kind of derogatory comment no matter how
witless or crude.
See also:
Flame War
- Flame War
- When an online
discussion degenerates into a series of personal attacks against the
debators, rather than discussion of their positions. A heated
exchange.
See also: Flame
- FTP -- (File Transfer Protocol)
- A very common method of
moving files between two Internet sites.
FTP is a way to login to another Internet site for the
purposes of retrieving and/or sending files. There are many Internet
sites that have established publicly accessible repositories of
material that can be obtained using FTP, by logging in using the
account name "anonymous", thus these sites are called "anonymous ftp
servers".
FTP was invented and in wide use long before the advent of the
World Wide Web and originally was always used from a text-only
interface.
See also: Login,
WWW
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-
- Gateway
- The technical
meaning is a hardware or software set-up that translates between two
dissimilar protocols, for example America Online has a gateway that
translates between its internal, proprietary e-mail format and
Internet e-mail format. Another, sloppier meaning of gateway is to
describe any mechanism for providing access to another system, e.g.
AOL might be called a gateway to the Internet.
- GIF -- (Graphic Interchange Format)
- A common format for
image files, especially suitable for images containing large areas
of the same color. GIF format files of simple images are often
smaller than the same file would be if stored in JPEG format,
but GIF format does not store photographic images as well as JPEG.
See also:
JPEG,
PNG
- Gigabyte
- 1000 or 1024
Megabytes, depending on who is measuring.
See also: Byte
- Gopher
- Invented at the
University of Minnesota in 1993 just before the Web, gopher
was a widely successful method of making menus of material available
over the Internet.
Gopher was designed to be much easier to use than FTP,
while still using a text-only interface.
Gopher is a Client and Server style program,
whichrequires that the user have a Gopher Client program.
Although Gopher spread rapidly across the globe in only a couple of
years, it has been largely supplanted by Hypertext, also known as
WWW (World Wide Web). There are still thousands of Gopher
Servers on the Internet and we can expect they will remain for a
while.
See also:
Client, FTP,
WWW
- Back to Index
-
- hit
- As used in reference to
the World Wide Web, ?hit? means a single request from a web
browser for a single item from a web server; thus in
order for a web browser to display a page that contains 3 graphics,
4 ?hits? would occur at the server: 1 for the HTML page, and
one for each of the 3 graphics.
See also:
Browser, HTML,
Server
- Home Page (or Homepage)
-
Several meanings. Originally, the web page that your
browser is set to use when it starts up. The more common meaning
refers to the main web page for a business, organization, person or
simply the main page out of a collection of web pages, e.g. "Check
out so-and-so's new Home Page."
See also:
Browser, WWW
- Host
- Any computer on a
network that is a repository for services available to other
computers on the network. It is quite common to have one host
machine provide several services, such as SMTP (email) and
HTTP (web).
See also:
Network,
SMTP
- HTML -- (HyperText Markup Language)
- The coding language
used to create Hypertext documents for use on the World
Wide Web. HTML looks a lot like old-fashioned typesetting code,
where you surround a block of text with codes that indicate how it
should appear.
The "hyper" in Hypertext comes from the fact that in HTML you can
specify that a block of text, or an image, is linked to another file
on the Internet. HTML files are meant to be viewed using a "Web
Browser".
HTML is loosely based on a more comprehensive system for markup
called SGML, and is expected to eventually be replaced by
XML-based XHTML standards.
See also:
Browser, Hypertext,
SGML,
WWW,
XHTML,
XML
- HTTP -- (HyperText Transfer Protocol)
- The protocol for
moving hypertextfiles across the Internet. Requires a
HTTP client program on one end, and an HTTP server
program (such as Apache) on the other end. HTTP is the most
important protocol used in the World Wide Web (WWW).
See also:
Apache, Client,
Hypertext,
Server,
WWW
- Hypertext
- Generally, any
text that contains links to other documents - words or phrases in
the document that can be chosen by a reader and which cause another
document to be retrieved and displayed.
See also:
HTML,
HTTP
- Back to Index
-
- IMAP -- (Internet Message Access Protocol)
- IMAP is gradually
replacing POP as the main protocol used by email clients
in communicating with email servers.
Using IMAP an email client program can not only retrieve email
but can also manipulate message stored on the server, without having
to actually retrieve the messages. So messages can be deleted, have
their status changed, multiple mail boxes can be managed, etc.
IMAP is defined in RFC 2060
See also:
Client, Email,
POP, RFC,
Server
- IMHO -- (In My Humble Opinion)
- A shorthand appended
to a comment written in an online forum, IMHO indicates that the
writer is aware that they areexpressing a debatable view, probably
on a subject already under discussion. One of many such shorthands
in common use online, especially in discussion forums.
- internet (Lower case i)
- Any
time you connect 2 or more networks together, you have an
internet - as in inter-national or inter-state.
See also:
Internet (Upper case I),
Network
- Internet (Upper case I)
- The
vast collection of inter-connected networks that are connected using
the TCP/IP protocols and that evolved from the ARPANET
of the late 60's and early 70's.
The Internet connects tens of thousands of independent networks
into a vast global internet and is probably the largest
Wide Area Network in the world.
See also:
internet (Lower case i),
Network, WAN
- Intranet
- A private
network inside a company or organization that uses the same
kinds of software that you would find on the public Internet,
but that is only for internal use. Compare with extranet.
See also:
Extranet,
internet (Lower case i),
Internet (Upper case I)
- IP Number -- (Internet Protocol Number)
- Sometimes called
a dotted quad. A unique number consisting of 4 parts separated by
dots, e.g.
165.113.245.2
Every machine that is on the Internet has a unique IP number - if a
machine does not have an IP number, it is not really on the
Internet. Many machines (especially servers) also have one or more
Domain Names that are easier for people to remember.
See also:
Domain Name,
Server,
TCP/IP
- IPv4 -- (Internet Protocol, version 4)
- The most widley used
version of the Internet Protocol (the "IP" part of TCP/IP.)
IPv4 allows for a theoretical maximum of approximately four billion
IP Numbers (technically 232), but the actual
number is far less due to inefficiencies in the way blocks of
numbers are handled by networks. The gradual adoption of IPv6
will solve this problem.
See also:
IP Number,
IPv6,
Network,
Protocol,
TCP/IP
- IPv6 -- (Internet Protocol, version 6)
- The successor to
IPv4. Already deployed in some cases and gradually spreading,
IPv6 provides a huge number of available IP Numbers - over a
sextillion addresses (theoretically 2128). IPv6 allows
every device on the planet to have its own IP Number.
See also:
IP Number,
IPv4,
Network,
Protocol,
TCP/IP
- IRC -- (Internet Relay Chat)
- Basically a huge
multi-user live chat facility. There are a number of major IRC
servers around the world which are linked to each other. Anyone
can create a channel and anything that anyone types in a given
channel is seen by all others in the channel. Private channels can
(and are) created for multi-person conference calls.
See also:
Server
- ISDN -- (Integrated Services Digital Network)
- Basically a way to
move more dataover existing regular phone lines. ISDN is available
to much of the USA and in most markets it is priced very comparably
to standard analog phone circuits. It can provide speeds of roughly
128,000 bits-per-second over regular phone lines. In practice, most
people will be limited to 56,000or 64,000 bits-per-second.
Unlike DSL, ISDN can be used to connect to many different
locations, one at a time, just like a regular telephone call, as
long the other location also has ISDN.
See also:
DSL
- ISP -- (Internet Service Provider)
- An institution that
provides access to the Internet in some form, usually for money.
- IT -- (Information Technology)
- A very general term
referring to the entire field of Information Technology - anything
from computer hardware to programming to network management. Most
medium and large size companies have IT Departments.
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-
- Java
- Java is a
network-friendly programming language invented by Sun Microsystems.
Java is often used to build large, complex systems that involve
several different computers interacting across networks, for example
transaction processing systems.
Java is also used to create software with graphical user interfaces
such as editors, audio players, web browsers, etc.
Java is also popular for creating programs that run in small
electronic devicws, such as mobile telephones.
Using small Java programs (called "Applets"), Web pages can
include functions such as animations,calculators, and other fancy
tricks.
See also:
Applet, JDK
- JavaScript
- JavaScript is a
programming language that is mostly used in web pages, usually to
add features that make the web page more interactive. When
JavaScript is included in an HTML file it relies upon the
browser to interpret the JavaScript. When JavaScript is combined
with Cascading Style Sheets(CSS), and later versions of HTML
(4.0 and later) the result is often called DHTML.
See also:
Ajax,
DHTML,
HTML
- JDK -- (Java Development Kit)
- A software development
package from Sun Microsystems that implements the basic set of tools
needed to write, test and debugJava applications and
applets
See also:
Applet, Java
- JPEG -- (Joint Photographic Experts Group)
- JPEG is most commonly
mentioned as a format for image files. JPEG format is preferred to
the GIF format for photographic images as opposed to line art
or simple logo art.
See also:
GIF,
PNG
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-
- Kilobyte
- A thousand bytes.
Actually, usually 1024 (210) bytes.
See also: Byte
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-
- LAN -- (Local Area Network)
- A computer network
limited to the immediate area, usually the same building or floor of
a building.
See also:
Network, VPN,
WAN
- Leased Line
- Refers to line
such as a telephone line or fiber-optic cable that is rented for
exclusive 24-hour, 7-days-a-week use from your location to another
location. The highest speed data connections require a leased line.
See also:
DSL,
ISDN
- Linux
- A widely used Open
Source Unix-like operating system. Linux was first released by its
inventor Linus Torvalds in 1991. There are versions of Linux for
almost every available type of computer hardware from desktop
machines to IBM mainframes. The inner workings of Linux are open and
available for anyone to examine and change as long as they make
their changes available to the public. This has resulted in
thousands of people working on various aspects of Linux and
adaptation of Linux for a huge variety of purposes, from servers to
TV-recording boxes.
See also:
Open
Source Software, Unix
- Listserv ®
- The most
common kind of maillist, "Listserv" is a registered trademark
of L-Soft international, Inc. Listservs originated on BITNET
but they are now common on the Internet.
See also:
BITNET,
Internet (Upper case I),
Maillist
- Login
- Noun or a verb.
Noun: The account name used to gain access to a computer system.
Not a secret (contrast with Password).
Verb: the act of connecting to a computer system by giving your
credentials (usually your "username" and "password")
See also:
Password
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-
- Maillist
- (or Mailing
List) A (usually automated) system that allows people to send
e-mail to one address, whereupon their message is copied and
sent to all of the other subscribers to the maillist. In this way,
people who have many different kinds of e-mail access can
participate in discussions together.
See also:
Email,
Listserv ®
- Mashup
- A web page or site
made by automatically combining content from other sources, usually
by using material available via RSS feeds and/or REST
interfaces.
See also:
REST,
RSS
- Megabyte
- Technically
speaking, a million bytes. In many cases the term means 1024
kilobytes, which is a more than an even million.
See also: Byte,
Kilobyte
- Meta Tag
- A specific kind of
HTML tag that contains information not normally displayed to
the user. Meta tags contan information about the page itself, hence
the name ("meta" means "about this subject")
Typical uses of Meta tags are to include information for
search engines to help them better categorize a page.
You can see the Meta tags in a page if you view the pages' source
code.
See also:
HTML,
Search Engine,
SEO
- MIME -- (Multipurpose Internet Mail Extensions)
- Originally a standard
for defining the types of files attached to standard Internet mail
messages. The MIME standard has come to be used in many situations
where one cmputer programs needs to communicate with another program
about what kind of file is being sent.
For example, HTML files have a MIME-type of
text/html
, JPEG files are image/jpeg
,
etc.
See also:
HTML,
JPEG
- Mirror
- Generally speaking,
"to mirror" is to maintain an exact copy of something. Probably the
most common use of the term on the Internet refers to "mirror sites"
which are web sites, or FTP sites that maintain copies
of material originated at another location, usually in order to
provide more widespread access to the resource. For example, one
site might create a library of software, and 5 other sites might
maintain mirrors of that library.
See also:
FTP,
WWW
- Modem -- (MOdulator, DEModulator)
- A device that
connects a computer to a phone line. A telephone for a computer. A
modem allows a computer to talk to other computers through the phone
system. Basically, modems do for computers what a telephone does for
humans.
The maximum practical bandwidth using a modem over regular
telephone lines is currently around 57,000 bps.
See also:
Bandwidth,
bps
- mod_perl
- An add-on for the
Apache web server software, mod_perl makes it possible to use
the Perl language to add new features for the Apache server, and to
increase the speed of Perl applications by as much as 30 times.
See also:
Apache
- MOO -- (Mud, Object Oriented)
- One of several kinds of
multi-user role-playing environments.
See also:
MUD
- Mosaic
- The first WWW
browser that was available for the Macintosh, Windows,and UNIX
all with the same interface. Mosaic really started the popularity of
the Web. The source-code to Mosaic was licensed by several companies
and used to create many other web browsers.
Mosaic was developed at the National Center for Supercomputing
Applications (NCSA), at the University of Illinois in
Urbana-Champaign, in Illinois, USA. The first version was released
in late 1993.
See also:
Browser, WWW
- MUD -- (Multi-User Dungeon or Dimension)
- A (usually text-based)
multi-user simulation environment. Some are purely for fun and
flirting, others are used for serious software development, or
education purposes and all thatlies in between. A significant
feature of most MUDs is that users can create things that stay after
they leave and which other users can interact within their absence,
thus allowing a world to be built gradually and collectively.
See also:
MOO
- MUSE -- (Multi-User Simulated Environment)
- One kind of MUD -
usually with little or no violence.
See also:
MUD
- Back to Index
-
- Netiquette
- The etiquette on
the Internet.
- Netizen
- Derived from the
term citizen, referring to a citizen of the Internet,or
someone who uses networked resources. The term connotes civic
responsibility and participation.
- Netscape
- A WWW Browser
and the name of a company. The Netscape (tm) browser was originally
based on the Mosaic program developed at the National Center
for Supercomputing Applications (NCSA).
See also:
Mosaic
- Network
- Any time you
connect 2 or more computers together so that they can share
resources, you have a computer network. Connect 2 or more networks
together and you have an internet.
See also:
internet (Lower case i)
- Newsgroup
- The name for
discussion groups on USENET.
See also:
USENET
- NIC -- (Network Information Center)
- Generally, any office
that handles information for a network. The most famous of these on
the Internet was the InterNIC, which was where most new domain names
were registered until that process was decentralized to a number of
private companies. Also means "Network Interface card", which is the
card in a computer that you plug a network cable into.
See also:
Domain Name,
Network
- NNTP -- (Network News Transport Protocol)
- The protocol used by
clientand server software to carry USENET
postings back and forth over a TCP/IP network. If you
are using any of the more common software such as Netscape,
Nuntius, Internet Explorer, etc. to participate in newsgroups
then you are benefiting from an NNTP connection.
See also:
Client, Server,
TCP/IP
- Node
- Any single computer
connected to a network.
See also:
Network
- Back to Index
-
- Open Content
- Copyrighted
information (such as this Glossary) that is made available by the
copyright owner to the general public under license terms that allow
reuse of the material, often with the requirement (as with this
Glossary) that the re-user grant the public the same rights to the
modified version that the re-user received from the copyright owner.
Information that is in the Public Domain might also be considered
a form of Open Content.
See also:
Open
Source Software
- Open Source Software
- Open
Source Software is software for which the underlying programming
code is available to the users so that they may read it, make
changes to it, and build new versions of the software incorporating
their changes. There are many types of Open Source Software, mainly
differing in the licensing term under which (altered) copies of the
source code may (or must be) redistributed.
See also:
Open Content
- Back to Index
-
- Packet Switching
- The method
used to move data around on the Internet. In packet
switching, all the data coming out of a machine is broken up into
chunks, each chunk has the address of where it came from and where
it is going. This enables chunks of data from many different sources
to co-mingle on the same lines, and be sorted and directed along
different routes by special machines along the way. This way many
people can use the same lines at the same time.
You might think of several caravans of trucks all using the same
road system to carry materials.
See also:
Internet (Upper case I), Router
- Password
- A code used to
gain access (login) to a locked system. Good passwords
contain letters and non-letters and are not simple combinations such
as virtue7. A good password might be:
5%df(29)
But don't use that one!
See also: Login
- PDF -- (Portable Document Format)
- A file format designed
to enable printing and viewing of documents with all their
formatting (typefaces, images, layout, etc.) appearing the same
regardless of what operating system is used, so a PDF document
should look the same on Windows, Macintosh, linux, OS/2, etc. The
PDF format is based on the widely used Postcript
document-description language. Both PDF and Postscript were
developed by the Adobe Corporation.
- Perl -- (Practical Extraction and Report Language)
- Perl is a programming
language that is widely used for both very simple, small tasks and
for very large complex applications.
During the 1990s it became the de-facto standard for creating CGI
programs. Perl is known for providing many ways to accomplish the
same task, with "there's more than one way to do it" being something
of a motto in the Perl community.
Because it is so easy to perform simple tasks in Perl it is often
used by people with little or no formal programming training, and
because Perl provides many sophisticated features it is often used
by professionals for creating complex data-processing software,
including the "server-side" of large web sites. Perl
does not provide significant support for creating programs with a
graphical user interface.
See also:
CGI,
Java,
JavaScript,
PHP,
Website
- Permalink
- A "permanent
link" to a particular posting in a blog. A permalink is a
URI that points to a specific blog posting, rather than to the
page in which the posting original occured (which may no longer
contain the posting.)
See also: Blog,
URI
- PHP -- (PHP: Hypertext Preprocessor)
- PHP is a programming
language used almost exclusively for creating software that is part
of a web site. The PHP language is designed to be
intermingled with the HTML that is used to create web
pages. Unlike HTML, the PHP code is read and processed by the
web server software (HTML is read and processed by the web
browser software.)
See also:
Browser, HTML,
JavaScript,
Perl, Server,
Web page,
Website
- ping
- To check if a server
is running. From the sound that a sonar systems makes in movies, you
know, when they are searching for a submarine.
- Plug-in
- A (usually small)
piece of software that adds features to a larger piece of software.
Common examples are plug-ins for the Netscape® browser and
web server. Adobe Photoshop® also uses plug-ins.
See also:
Browser, Server
- PNG -- (Portable Network Graphics)
- PNG is a graphics
format specifically designed for use on the World Wide Web. PNG
enable compression of images without any loss of quality, including
high-resolution images. Another important feature of PNG is that
anyone may create software that works with PNG images without paying
any fees - the PNG standard is free of any licensing costs.
See also:
GIF,
JPEG
- podcasting or pod-casting
- A
form of audio broadcasting using the Internet, podcasting takes its
name from a combination of "iPod" and broadcasting. iPod is the
immensely popular digital audio player made by Apple computer, but
podcasting does not actually require the use of an iPod.
Podcasting involves making one or more audio files available as
"enclosures" in an RSS feed. A pod-caster creates a list of
music, and/or other sound files (such as recorded poetry, or "talk
radio" material) and makes that list available in the RSS 2.0
format. The list can then be obtained by other people using various
podcast "retriever" software which read the feed and makes the audio
files available to digital audio devices (including, but not limited
to iPods) where users may then listen to them at their convenience.
See also:
RSS
- POP -- (Point of Presence, also Post Office Protocol)
- Two commonly used
meanings:
Point of Presence and Post Office Protocol.
A Point of Presence usually means a city or location where a
network can be connected to, often with dial up phone lines. So if
an Internet company says they will soon have a POP in Belgrade, it
means that they will soon have a local phone number in Belgrade
and/or a place where leased lines can connect to their network.
A second meaning, Post Office Protocol refers to a way that
e-mail client software such as Eudora gets mail from a mail
server. When you obtain an account from an Internet Service
Provider (ISP) you almost always get a POP account with it,
and it is this POP account that you tell your e-mail software to use
to get your mail. Another protocol called IMAP is replacing POP for
email.
See also:
Client, Email,
IMAP,
ISP,
Server
- Port
- 3 meanings. First and
most generally, a place where information goes into or out of a
computer, or both. E.g. the serial port on a personal computer is
where a modem would be connected.
On the Internet port often refers to a number that is part of a
URL, appearing after a colon (:) right after the domain name. Every
service on an Internet server listens on a particular port number on
that server. Most services have standard port numbers, e.g. Web
servers normally listen on port 80. Services can also listen on
non-standard ports, in which case the port number must be specified
in a URL when accessing the server, so you might see a URL of the
form:
gopher://peg.cwis.uci.edu:7000/
This shows a gopher server running on a non-standard port (the
standard gopher port is 70).
Finally, port also refers to translating a piece of software to
bring it from one type of computer system to another, e.g. to
translate a Windows program so that is will run on a Macintosh.
See also:
URL
- Portal
- Usually used as a
marketing term to described a Web site that is or is intended to be
the first place people see when using the Web. Typically a "Portal
site" has a catalog of web sites, a search engine, or both. A Portal
site may also offer email and other service to entice people to use
that site as their main "point of entry" (hence "portal") to the
Web.
- Posting
- A single message
entered into a network communications system.
- PPP -- (Point to Point Protocol)
- The most common
protocol used to connect home computers to the Internet over regular
phone lines.
Most well known as a protocol that allows a computer to use a
regular telephone line and a modem to make TCP/IPconnections
and thus be really and truly on the Internet.
See also:
Modem,
SLIP,
TCP/IP
- Protocol
- On the Internet
"protocol" usually refers to a set of rules that define an exact
format for communication between systems. For example the HTTP
protocol defines the format for communication between web browsers
and web servers, the IMAP protocol defines the format for
communication between IMAP email servers and clients, and the SSL
protocol defines a format for encrypted communications over the
Internet.
Virtually all Internet protocls are defined in RFC documents.
See also:
FTP,
HTTP,
IMAP,
POP, PPP,
RFC,
SLIP,
SMTP,
SNMP,
SSL,
TCP/IP, UDP
- Proxy Server
- A Proxy Server
sits in between a Client and the "real" Server that a
Client is trying to use. Client's are sometimes configured to use a
Proxy Server, usually an HTTP server. The clients makes all
of it's requests from the Proxy Server, which then makes requests
from the "real" server and passes the result back to the Client.
Sometimes the Proxy server will store the results and give a stored
result instead of making a new one (to reduce use of a Network).
Proxy servers are commonly established on Local Area Networks
See also:
Client, HTTP,
LAN,
Network,
Server
- PSTN -- (Public Switched Telephone Network)
- The regular
old-fashioned telephone system.
- Back to Index
-
- RDF -- (Resource Definition Framework)
- A set of rules (a sort
of language) for creating descriptions of information, especially
information available on the World Wide Web. RDF could be
used to describe a collection of books, or artists, or a collection
of web pages as in the RSS data format which uses RDF
to create machine-readable summaries of web sites.
RDF is also used in XPFE applications to define the
relationships between different collections of elements, for example
RDF could be used to define the relationship between the data in a
database and the way that data is displayed to a user.
See also:
RSS, Web page,
WWW,
XML,
XPFE,
XUL
- REST -- (REpresentational State Transfer)
- A loosely defined
specification for HTTP-based services where all of the
information required to process a request is present in the initial
request and where each request receives only a single response, and
where the response is in a machine-readable form.
An example could be a service that accepts HTTP requests for a
search and returns the result as an XML document.
See also:
HTTP,
Mashup,
XML
- RFC -- (Request For Comments)
- The name of the result
and the process for creating a standard on the Internet. New
standards are proposed and published on the Internet, as a Request
For Comments. The proposal is reviewed by the Internet Engineering
Task Force (http://www.ietf.org/), a consensus-building body that
facilitates discussion, and eventually a new standard is
established, but the reference number/name for the standard retains
the acronym RFC, e.g. the official standard for e-mail
message formats is RFC 822.
- Router
- A special-purpose
computer (or software package) that handles the connection between 2
or more Packet-Switched networks. Routers spend all their
time looking at the source and destination addresses of the
packets passing through them and deciding which route to send
them on.
See also:
Network,
Packet Switching
- RSS -- (Rich Site Summary or RDF Site Summary or Real
Simple Syndication)
- A commonly used
protocol for syndication and sharing of content, originally
developed to facilitate the syndication of news articles, now widely
used to share the contents of blogs. Mashups are often
made using RSS feeds.
RSS is an XML-based summary of a web site, usually used for
syndication and other kinds of content-sharing.
There are RSS "feeds" which are sources of RSS information about web
sites, and RSS "readers" which read RSS feeds and display their
content to users.
RSS is being overtaken by a newer, more complex protocol called
Atom.
See also: Atom,
Blog,
Mashup,
RDF,
XML
- RTSP -- (Real Time Streaming Protocol)
- RTSP is an official
Internet standard (RFC 2326) for delivering and receiving
streams of data such as audio and video.
The standard allows for both real-time ("live") streams of data and
streams from stored data.
See also:
RFC
- Back to Index
-
- SDSL -- (Symmetric Digital Subscriber Line)
- A version of DSL
where the upload speeds and download speeds are the same.
See also:
ADSL,
DSL
- Search Engine
- A (usually
web-based) system for searching the information available on the
Web.
Some search engines work by automatically searching the contents
of other systems and creating a database of the results. Other
search engines contains only material manually approved for
inclusion in a database, and some combine the two approaches.
See also:
WWW
- Security Certificate
- A
chunk of information (often stored as a text file) that is used by
the SSL protocol to establish a secure connection.
See also:
SSL
- SEO -- (Search Engine Optimization)
- The practice of
designing web pages so that they rank as high as possible in search
results from search engines.
There is "good" SEO and "bad" SEO. Good SEO involves making the web
page clearly describe its subject, making sure it contains truly
useful information, including accurate information in Meta tags,
and arranging for other web sites to make links to the page. Bad SEO
involves attempting to deceive people into believing the page is
more relevant than it truly is by doing things like adding
inaccurate Meta tags to the page.
See also:
Meta Tag,
Search Engine
- Server
- A computer, or a
software package, that provides a specific kind of service to
client software running on other computers. The term can refer
to a particular piece of software, such as a WWW server, or
to the machine on which the software is running, e.g. "Our mail
server is down today, that's why e-mail isn't getting out."
A single server machine can (and often does) have several
different server software packages running on it, thus providing
many different servers to clients on the network.
Sometimes server software is designed so that additional
capabilities can be added to the main program by adding small
programs known as servlets.
See also:
Client, Network,
Servlet
- Servlet
- A small computer
program designed to be add capabilities to a larger piece of
server software.
Common examples are "Java servlets", which are small programs
written in the Java language and which are added to a web
server. Typically a web server that uses Java servlets will have
many of them, each one designed to handle a very specific situation,
for example one servlet will handle adding items to a "shopping
cart", while a different servlet will handle deleting items from the
"shopping cart."
See also: Java,
Server,
Web
- SGML -- (Standard Generalized Markup Language)
- Developed in 1986 SGML
provides a rich set of rules for defining new data formats. A
well-known example of using SGML is XML, which is a subset of
SGML: The definition of XML is all of SGML minus a couple of dozen
items. SGML is an International Standards Organization (ISO)
standard: ISO 8879:1986.
See also:
XHTML,
XML
- SLIP -- (Serial Line Internet Protocol)
- A standard that was
popular in the early 1990's for using a regular telephone line (a
serial line) and a modem to connect a computer as a realInternet
site. SLIP has largely been replaced by PPP.
See also:
PPP
- SMDS -- (Switched Multimegabit Data Service)
- A standard for very
high-speed data transfer.
- SMTP -- (Simple Mail Transfer Protocol)
- The main protocol used
to send electronic mail from server to server on the
Internet.
SMTP is defined in RFC 821 and modified by many later
RFC's.
See also:
Email,
RFC,
Server
- SNMP -- (Simple Network Management Protocol)
- A set of standards for
communication with devices connected to a TCP/IP network.
Examples of these devices include routers, hubs, and
switches.
SNMP is defined in RFC 1089
See also:
Network, RFC,
Router,
TCP/IP
- SOAP -- (Simple Object Access Protocol)
- A protocol for
client-server communication that sends and receives
information "on top of" HTTP. The data sent and received is
in a particular XML format specifically designed for use with
SOAP. SOAP is similar to the XMLRPC protocol except that SOAP
provides for more sophisticated handling of complex data being sent
between a client and a server. SOAP actually grew from the work that
created XMLRPC.
Microsoft's ".NET" system is largely based on SOAP.
See also:
Client, HTTP,
Protocol,
Server,
XML,
XMLRPC
- Spam (or Spamming)
- An
inappropriate attempt to use a mailing list, or USENET
or other networked communications facility as if it was a broadcast
medium (which it is not) by sending the same message to a large
number of people who didn?t ask for it. The term probably comes from
a famous Monty Python skit which featured the word spam repeated
over and over. The term may also have come from someone?s low
opinion of the food product with the same name, which is generally
perceived as a generic content-free waste of resources. (Spam® is a
registered trademark of Hormel Corporation, for its processed meat
product.)
See also:
Maillist,
USENET
- Spyware
- A somewhat vague
term generally referring to software that is secretly installed on a
users computer and that monitors use of the computer in some way
without the users' knowledge or consent.
Most spyware tries to get the user to view advertising and/or
particular web pages. Some spyware also sends information
about the user to another machine over the Internet.
Spyware is usually installed without a users' knowledge as part of
the installation of other software, especially software such as
music sharing software obtained via download.
See also:
Download,
Web page
- SQL -- (Structured Query Language)
- A specialized language
for sending queries to databases. Most industrial-strength and many
smaller database applications can be addressed using SQL. Each
specific application will have its own slightly different version of
SQL implementing features unique to that application, but all
SQL-capable databases support a common subset of SQL.
A example of an SQL statement is:
SELECT name,email FROM people_table WHERE contry='uk'
- SSL -- (Secure Socket Layer)
- A protocol designed by
Netscape Communications to enable encrypted, authenticated
communications across the Internet.
- Sysop -- (System Operator)
- Anyone responsible
for the physical operations of a computer system or network
resource. For example, a System Administrator decides how often
backups and maintenance should be performed and the System Operator
performs those tasks.
- Back to Index
-
- T-1
- A leased-line
connection capable of carrying data at 1,544,000 bits-per-second.
At maximum theoretical capacity, a T-1 line could move a megabyte
in less than 10 seconds. That is still not fast enough for
full-screen, full-motion video, for which you need at least
10,000,000 bits-per-second. T-1 lines are commonly used to connect
large LANs to theInternet.
See also:
Bit,
Internet (Upper case I),
LAN,
Leased Line,
Megabyte
- T-3
- A leased-line
connection capable of carrying data at 44,736,000 bits-per-second.
This is more than enough to do full-screen, full-motionvideo.
See also:
Internet (Upper case I),
LAN,
Leased Line
- Tag
- The term "tag" can be
used as a noun or verb. As a noun, a tag is a basic element of the
languages used to create web pages (HTML) and similar
languages such as XML. Another, more recent meaning of tag is
related to reader-crearted tags where blogs and other content (such
as photos, music, etc.) may be "tagged" which means to assign a
keyword, such as "politics" or "gardening", this enables searches
for "all the blog postings in the past week that are tagged
'prenatal care'"
See also: Blog,
HTML,
XML
- TCP/IP -- (Transmission Control Protocol/Internet
Protocol)
- This is the suite of
protocols that defines the Internet. Originally designed for
the UNIX operating system, TCP/IP software is now included
with every major kind of computer operating system. To be truly on
the Internet, your computer must have TCP/IP software.
See also:
Internet (Upper case I),
IPv4,
IPv6,
Packet
Switching, Unix
- Telnet
- The command and
program used to login from one Internet siteto
another. The telnet command/program gets you to the login: prompt of
another host.
See also: Host,
Login
- Terabyte
- 1000 gigabytes.
See also:
Gigabyte
- Terminal
- A device that
allows you to send commands to a computer somewhere else. At a
minimum, this usually means a keyboard and a display screen and some
simple circuitry. Usually you will use terminal software in a
personal computer - the software pretends to be (emulates) a
physical terminal and allows you to type commands to a computer
somewhere else.
- Terminal Server
- A special
purpose computer that has places to plug in many modemson one
side, and a connection to a LAN or host machine onthe
other side. Thus the terminal server does the work of answering the
calls and passes the connections on to the appropriate node.
Most terminal servers can provide PPP or SLIP services
if connected to the Internet.
- TLD -- (Top Level Domain)
- The last (right-hand)
part of a complete Domain Name. For example in the domain
name www.matisse.net ".net" is the Top Level Domain.
There are a large number of TLD's, for example .biz, .com, .edu,
.gov, .info, .int, .mil, .net, .org, and a collection of two-letter
TLD's corresponding to the standard two-letter country codes, for
example, .us, .ca, .jp, etc.
See also:
Domain Name
- Trojan Horse
- A computer
program is either hidden inside another program or that masquerades
as something it is not in order to trick potential users into
running it. For example a program that appears to be a game or image
file but in reality performs some other function. The term "Trojan
Horse" comes from a possibly mythical ruse of war used by the Greeks
sometime between 1500 and 1200 B.C.
A Trojan Horse computer program may spread itself by sending
copies of itself from the host computer to other computers, but
unlike a virus it will (usually) not infect other programs.
See also: Virus,
Worm
- Back to Index
-
- UDP -- (User Datagram Protocol)
- One of the protocols
for data transfer that is part of the TCP/IP suite of
protocols. UDP is a "stateless" protocol in that UDP makes no
provision for acknowledgement of packets received.
See also:
Packet
Switching,
TCP/IP
- Unix
- A computer operating
system (the basic software running on a computer, underneath things
like word processors and spreadsheets). Unix is designed to be used
by many people at the same time (it is multi-user) and has TCP/IP
built-in. It is the most common operating system for servers
on the Internet.
Apple computers' Macintosh operating system, as of version 10
("Mac OS X"), is based on Unix.
See also: Linux,
Server,
TCP/IP
- Upload
- Transferring data
(usually a file) from a the computer you are using to another
computer. The opposite of download.
See also:
Download
- URI -- (Uniform Resource Identifier)
- An address for s
resource available on the Internet.
The first part of a URI is called the "scheme". the most well
known scheme is http, but there are many others. Each URI
scheme has its own format for how a URI should appear.
Here are examples of URIs using the http, telnet, and
news schemes:
http://www.matisse.net/files/glossary.html
telnet://well.sf.ca.us
news:new.newusers.questions
See also:
URL,
URN
- URL -- (Uniform Resource Locator)
- The term URL is
basically synonymous with URI. URI has replaced URL in
technical specifications.
See also:
URI,
URN
- URN -- (Uniform Resource Name)
- A URI that is
supposed to be available for along time. For an address to be a URN
some institution is supposed to make a commitment to keep the
resource available at that address.
See also:
URI
- USENET
- A world-wide system
of discussion groups, with comments passed among hundreds of
thousands of machines. Not all USENET machines are on the
Internet. USENET is completely decentralized, with over 10,000
discussion areas, called newsgroups.
See also:
Newsgroup
- UUENCODE -- (Unix to Unix Encoding)
- A method for
converting files from Binaryto ASCII (text) so that
they can be sent across the Internet via email.
See also:
ASCII, Binary,
Email
- Back to Index
-
- Veronica -- (Very Easy Rodent Oriented Net-wide Index to
Computerized Archives)
- Developed at the
University of Nevada, Veronica was a constantly updated database of
the names of almost every menu item on thousands of gopherservers.
The Veronica database could be searched from most major gophermenus.
Now made obsolete by web-bases search engines.
See also:
Gopher, Search
Engine
- Virus
- A chunk of computer
programming code that makes copies of itself without any concious
human intervention. Some viruses do more than simply replicate
themselves, they might display messages, install other software or
files, delete software of files, etc.
A virus requires the presence of some other program to replicate
itself. Typically viruses spread by attaching themselves to programs
and in some cases files, for example the file formats for Microsoft
word processor and spreadsheet programs allow the inclusion of
programs called "macros" which can in some cases be a breeding
ground for viruses.
See also:
Trojan Horse,
Worm
- VOIP -- (Voice Over IP)
- A specification and
various technologies used to allow making telephone calls over IP
networks, especially the Internet.
Just as modems allow computers to connect to the Internet
over regular telephone lines, VOIP technology allows humans to talk
over Internet connections.
Costs for VOIP calls can be a lot lower than for traditional
telephone calls. Because the IP networks are packet-switched
this allows for vastly different ways of handling connections and
more efficient use of network resources.
See also:
Internet (Upper case I),
IPv4,
IPv6,
Modem,
Packet
Switching
- VPN -- (Virtual Private Network)
- Usually refers to a
network in which some of the parts are connected using the
public Internet, but the data sent across the Internet is
encrypted, so the entire network is "virtually" private.
See also:
Internet (Upper case I)
- Back to Index
-
- WAIS -- (Wide Area Information Servers)
- Developed in the early
1990s WAIS was the first truly large-scale system to allow the
indexing of huge quantities of information on the Web, and to
make those indices searchable across networks such as the
Internet. WAIS was also pioneering in its use of ranked (scored)
results where the software tries to determine how relevant each
result it.
- WAN -- (Wide Area Network)
- Any internet or
network that covers an area larger than a single building or
campus.
See also:
internet (Lower case i),
LAN
- Web
- Short for "World Wide
Web."
See also:
WWW
- Web page
- A document
designed for viewing in a web browser. Typically
written in HTML. A web site is made of one or more web
pages.
See also:
Browser, HTML,
Web,
Website
- WebDAV -- (Web-based Distributed Authoring and
Versioning)
- A set of extensions
to the HTTP protocol that allows multiple users to not only
read but also to add, delete, and change documents residing on a web
server.
In order to use WebDAV you need WebDAV client software to
connect to a HTTP server that has the WebDAV extensions
installed.
Virtually all common HTTP servers have WedDAV extensions available
to them.
See also:
Client, HTTP,
Server
- Website
- The entire
collection of web pages and other information (such as
images, sound, and video files, etc.) that are made available
through what appears to users as a single web server. Typically all
the of pages in a web site share the same basic URL, for
example the following URLs are all for pages within the same web
site:
http://www.baytherapy.com/
http://www.baytherapy.com/whatis/
http://www.baytherapy.com/teenagers/
The term has a somewhat informal nature since a large
organization might have separate "web sites" for each division, but
someone might talk informally about the organizations' "web site"
when speaking of all of them.
See also: Web,
Web page
- Wi-Fi -- (Wireless Fidelity)
- A popular term for a
form of wireless data communication, basically Wi-Fi is "Wireless
Ethernet".
See also:
Ethernet
- Worm
- A worm is a virus
that does not infect other programs. It makes copies of itself, and
infects additional computers (typically by making use of network
connections) but does not attach itself to additional programs;
however a worm might alter, install, or destroy files and programs.
See also:
Trojan Horse,
Virus
- WWW -- (World Wide Web)
- World Wide Web (or
simply Web for short) is a term frequently used (incorrectly) when
referring to "The Internet", WWW has two major meanings:
First, loosely used: the whole constellation of resources that
can be accessed using Gopher, FTP, HTTP,telnet, USENET, WAIS
and some other tools.
Second, the universe of hypertext servers (HTTP
servers), more commonly called "web servers", which are the
servers that serve web pages to web browsers.
See also:
Browser, FTP,
Gopher,
HTTP,
Internet (Upper case I), Server,
URL,
Web,
Web page
- Back to Index
-
- XHTML -- (eXtensible HyperText Markup Language)
- Basically HTML
expressed as valid XML. XHTML is intended to be used in the
same places you would use HTML (creating web pages) but is much more
strictly defined, which makes it a lot easier to create sofware that
can read it, edit it, check it for errors, etc.
XHTML is expected to eventually replace HTML.
See also:
HTML,
XML
- XML -- (eXtensible Markup Language)
-
A widely used system for defining data formats. XML provides a very
rich system to define complex documents and data structures such as
invoices, molecular data, news feeds, glossaries, inventory
descriptions, real estate properties, etc.
As long as a programmer has the XML definition for a collection of
data (often called a "schema") then they can create a program to
reliably process any data formatted according to those rules.
XML is a subset of the older SGML specification - the
definition of XML is SGML minus a couple of dozen items.
See also:
Ajax,
SGML
- XMLRPC -- (XML Remote Procedure Call)
- A protocol
for client-server communication that sends and
receives information "on top of" HTTP. The data sent and
received is in a particular XML format specifically designed
for use with XMLRPC.
See also:
Client, HTTP,
Protocol,
Server,
SOAP,
XML
- XPFE -- (Cross Platform Front End)
- A suite of
technologies used to create applications that will work and look the
same on different computer operating systems. A widely used XPFE
application is the Mozilla web browser and its derivities, such as
the Netscape web browser in version 7 and later.
The primary technologies used in creating XPFE applications are
Javascript, Cascading Style Sheets, and XUL.
See also:
CSS,
JavaScript,
XUL
- XUL -- (eXtensible User-interface Language)
- A markup language
similar to HTML and based on XML.
XUL used to define what the user interface will look like for a
particular piece of software. XUL is used to define what buttons,
scrollbars, text boxes, and other user-interface items will appear,
but it is not used to define how those item will look (e.g. what
color they are).
The most widely used example of XUL use is probably in the
Firefox web browser, where the entire user interface is defined
using the XUL language.
See also:
HTML,
XML,
XPFE