<jargon> Advertising raw clock speed, instead of {bus speed}. IBM uses raw clock speed as the speed of the computer. In the IBM PC and IBM PC XT, the clock is divided by 4 to produce the 4-phase bus clocks. Thus a 4 MHz IBM XT really runs at 0.895 MHz, because that 4 MHz was really 3.58 MHz which gets divided by four. A Tandy Color Computer ran at exactly the same speed, but clock speed was specified as bus speed, 0.895 MHz, leaving the impression that it was 4 times slower. Actually it ran a little faster with a more efficient instruction set. If the actual clock rate had been specified on a CoCo 3, it would have been 14.32 MHz, although the bus speed was still 0.895 MHz. That high speed also generated video, color, and {hidden refresh} timing. 100 MHz computers are running at bus speeds of around 25 MHz. (1997-02-13)