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Glossary of Internet Terms and Phrases
Vector Graphics
- In computer graphics, a technique for representing a picture as points,
lines and other geometric entities. Vector graphics typically take up
considerably less file space, because they are a mathematical representation
of the elements of the image, rather than a matrix of pixels. All
computer-aided design (CAD), drawing and diagramming programs create vector
graphics formats.
Source: TechWeb.com
Virus
- A program or piece of code written by a cracker that "infects" one or
more other programs by embedding a copy of itself in them, so that they
become Trojan horses. When these programs are executed, the embedded virus
is executed too, thus propagating the "infection". This normally happens
invisibly to the user.
A virus has an "engine" - code that enables it to propagate and optionally a
"payload" - what it does apart from propagating. It needs a "host"
- the particular hardware and
software environment on which it can run and a "trigger" - the event
that starts it running.
Unlike a worm, a virus cannot infect other computers without assistance. It
is propagated by vectors such as humans trading programs with their friends.
The virus may do nothing but propagate itself and then allow the program to
run normally. Usually, however, after propagating silently for a while, it
starts doing things like writing "cute" messages on the terminal or playing
strange tricks with the display (some viruses include display hacks).
Viruses written by particularly antisocial crackers may do irreversible
damage, like deleting files.
By the 1990s, viruses had become a serious problem, especially among IBM PC
and Macintosh users (the lack of security on these machines enables viruses
to spread easily, even infecting the
operating system). The production of special antivirus software has
become an industry, and a number of exaggerated media reports have caused
outbreaks of near hysteria among users. Many lusers tend to blame
*everything* that doesn't work as they had expected on virus attacks.
Accordingly, this sense of "virus" has passed into popular usage where it is
often incorrectly used for a worm or Trojan horse.
Source: Dictionary.com
Visual Basic (VB)
- A popular event-driven visual programming system from Microsoft
Corporation for Microsoft Windows. VB is good for developing Windows
interfaces, it invokes fragments of BASIC code when the user performs
certain operations on graphical objects on-screen. It is widely used for
in-house application program development and for prototyping. It can also be
used to create
ActiveX and COM components.
Home:
http://msdn.microsoft.com/vbasic/.
Source: Dictionary.com
Visual Basic Script (VBScript)
- Microsoft's scripting language which is an extension of their
Visual Basic language. VBScript can be used with Microsoft Office
applications and others. It can also be embedded in
web pages but can only be understood by Internet Explorer.
Visual Basic is a BASIC variant with object-oriented features. Objects
include applications, windows and selections.
Source: Dictionary.com
Visual C++
- A {C} and C++ programming environment sold by Microsoft Corporation.
Source: Dictionary.com
VRML (Virtual Reality Modeling Language)
- A draft specification for the design and implementation of a
platform-independent language for virtual reality scene description.
Source: Dictionary.com
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