Thespeedof a computeris usuallyexpressed in cycles per second. Typicalmachinesoperate at100to200megahertz or100 million to200 million cycles per second.
The megahertz number so often cited in the marketing materials of computer companies refers to the computer's central processing unit chip as a partial measure of its ability to process data.
For those unfamiliar with the terminology, one gigahertz is equal to 1, 000 megahertz -- megahertz being the "clock speed" used to measure the basic performance of computer microprocessors.