macintosh is designed for simplicity. using a palm-sized unit called a mouse. >> it was the first time that a machine was personal, it was simple, it was friendly. >> it took the computer out of the exclusive domain of geeks and nerds and people who had memorized the commands and put it on the desk of everybody. untrained, nontechnical people. >> stores around the country put them on sale today, and analysts say it's a good bet that macintosh could soon be the biggest apple of the industry's eye. >> it's got its best years ahead of it, eventually i want to be able to carry my mac around with me, walk around with it in my pocket. >> pocket computer? >> yes. >> you really like that mac. would you trade it for an ibm? >> are you kidding? >> as material sciences progress, more and more circuitry keeps getting put on smaller and smaller chips, circuit boards. so the closer together elements on a chip are, the faster the motion of signals between them.