A way of measuring the speed of computers. Often abbreviated GHz. 1 gigahertz = 1000
megahertz = a billion cycles per second. The bigger the number the faster the
computer. It roughly counts how many additions per second. A 2 GHz
CPU (Central Processing Unit), all else being equal, will calculate twice as fast as
a 1 GHz CPU. Of course, unless the chips are of very similar
design, all else is nowhere near equal.