IBM AT 5170 Technical Reference page 463

g. Gram.
G.
(1)
Prefix giga; 1,000,000,000. (2) When referring to
computer storage capacity, 1,073,741,824. (1,073,741,824
=
2 to
the 30th power.)
gate. (1) A combinational logic circuit having one output
channel and one or more input channels, such that the output
channel state is completely determined by the input channel
states. (2)
A
signal that enables the passage of other signals
through a circuit.
Gb. 1,073,741,824 bytes.
general-purpose register. A register, usually explicitly
addressable within a set of registers, that can be used for different
purposes; for example, as an accumulator, as an index register, or
as a special handler of data.
giga (G). Prefix 1,000,000,000.
gram (g). A unit of weight (equivalent to 0.035 ounces).
graphic. A symbol produced by a process such as handwriting,
drawing, or printing.
graphic character. A character, other than a control character,
that is normally represented by a graphic.
half-duplex. (1) In data communication, pertaining to an
alternate, one way at a time, independent transmission. (2)
Contrast with duplex.
hardware. (1) Physical equipment used in data processing, as
~
opposed to programs, procedures, rules, and associated
documentation. (2) Contrast with software.
Glossary-17