This videocassette is one of the first video magazines published and is devoted to the Macintosh computer. This issue contains three segments: a 6-minute profile of TOPS , a unique system offered by Centram Systems West that allows the Mac and the IBM-PC to share the same files; a 40-minute comparison and tutorial of the programs Excel and Jazz; and a 20-minute interview of Andy Hertzfeld by Stewart Alsop.