G
 
gain
The ability to change the audibility of the sound, such as during a fade in or fade out of music.
GCC
See GNU Compiler Collection.
generic class
See class template.
global
Pertaining to information available to more than one program or subroutine. IBM.
global scope
(1) That portion of a source program that is not contained within a class, function, or namespace definition. (2) That portion of namespace scope that is not contained in a namespace definition. Also called global namespace scope. See scope. Contrast with class scope, local scope, namespace scope.
global variable
A symbol defined in one program module that is used in other independently compiled program modules.
glyph
A graphic symbol whose appearance conveys information; for example, the vertical and horizontal arrows on cursor keys that indicate the directions in which they control cursor movement.
GMT
See Greenwich Mean Time.
GNU Compiler Collection
Several versions of the compiler (C, C++, Objective-C, Ada, Fortran, Java and treelang) are integrated. GCC can compile programs written in any of these languages.
graphical user interface (GUI)
A type of computer interface consisting of a visual metaphor of a real-world scene, often of a desktop. Within that scene are icons, representing real-world objects, that the user can access and manipulate with a pointing device. See command line interface.
graphic attributes
Attributes that apply to graphic primitives. Examples are color, line type, and shading-pattern definition.
graphic primitive
In computer graphics, a basic element, such as an arc or a line, that is not made up of smaller parts and that is used to create diagrams and pictures. IBM.
graphics
A picture defined in terms of graphic primitives and graphic attributes.
graphics pipeline
A sequence of steps that renders a geometry onto a device through geometric transformations, clipping, lighting, and scaling. IBM.
Greenwich Mean Time
The basis of standard time. Now commonly replaced by Coordinated Universal Time (UTC).
group directive
A directive in a configuration file that defines all the files belonging to a source group. See source group.
GUI
See graphical user interface.
 
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