For PC users, Mac OS X takes some getting used to butI’ve been on the front lines of the Mac-PC war for as long as I can remember. My first work computer was an IBM PC with an 8088 CPU. I liked it so much I forked out the money to buy my own machine: an IBM PC XT clone running an 8086 chip, and bulging with 640KB of RAM and a whopping 20MB hard disk.