The s

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G		Giga-. (giga, not jiga) A prefix meaning billion.
GB		Gigabyte
garbage		Meaningless, apparently random characters.
GDI		Graphic Display Interface. A way a graphics accelerator card communicates.
GHz		Gigahertz.
.GIF		Graphics Interchange Format. The filename extension for graphic files in a format developed by CompuServe.
gigabyte		Either 1,000 megabytes or 1024 megabytes. .
gigaflops		A billion floating point operations per second.
gigahertz		A billion cycles per second.
GIGO		(guy-go) Garbage In, Garbage Out. The principle that incorrect or illegal input produces meaningless or invalid output.
glitch		An error in the reception of a signal that creates a small error in data without affecting the transmission. For example, a glitch might make a printer print a single incorrect character.
graphic character		Any character identified by the computer as a shape rather than as a byte. Compare text character.
graphics accelerator		A term referring to a higher end video controller that handles high speed graphics and usually contains at least 1MB of onboard video memory.
graphics character		Any character, usually from the upper 128 ASCII codes, that can produce lines and rectilinear shapes when entered next to each other.
graphics controller		A general term for any video card that is not limited to text characters but can also produce graphics. See video controller.
graphics mode		When the screen is drawn directly by the computer. The computer is able to put any shape it wants on the screen, limited only by the size, color, and number of pixels. Not limited to a set of characters. See text mode. Also one of a choice of resolutions.
gray scale		Refers to a monitor that shows four or more shades of gray. Also a sample by which to evaluate shades of gray, usually printed on paper. (This kind of gray scale looks like a rectangle that is white on one end and gets progressively darker until it reaches black at the other end.)
group		In Windows, a window containing related files.
GUI		(gooey) Graphical User Interface. A way to communicate with a computer that typically uses graphics mode instead of character mode. Usually involves a mouse. Compare command_line_interface and menu driven.
guru		A person with advanced computer skills willing to help others with their computer problems.

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