G

gamepad
controls cursor motion with arrow buttons.
gap, interblock
gap which separates logical blocks on magnetic tape
gap, interrecord
gap which separates records on magnetic tape
gateway
connects networks of different kinds
glidepad
a touch sensitive pad for controlling cursor motion. Click by tapping the pad. Popular for laptop computers.
grammar checker
looks for grammar/style errors
graphical user interface (GUI)
uses images in the user interface to make it easier for the user.
graphics
pictures and charts
graphics tablet
similar to digitizer but has special commands