Mr. Cheifet (pronounced chef-AY) broadcast “Computer Chronicles” from a set in San Mateo, Calif., that in its modest production values was just one step up from the public-access TV satire “Wayne’s World.” A mix of news, interviews and how-to segments, it introduced early adopters of what were then called “microcomputers” to the first Macintosh from Apple; Windows 95, the breakthrough Microsoft operating system; and a wondrous new communications tool: “electronic mail.”