Y'see, without that clock, the computer wouldn't boot. You're a bit later in the progression, then; the IBM PC had no clock battery and you had to manually set the clock on boot. There were a number ...

What made the IBM PC a truly revolutionary device when it debuted in 1981? The technical reference manual that came with it, for one thing. Michael Kanellos is editor at large at CNET News.com, where ...

Spec Showdown: The Original IBM 5150 vs. Today's PCs Just for kicks, let's compare the specs of the 1981-vintage computer that inspired the birth of PC Magazine to some modern-day desktops.