Apple Computer Inc expanded its Macintosh Performa line of home computers with three new Performa 570 series models: the Performa 575, 577 and 578 computers will feature a faster 33MHz – Motorola 68LC040 processor, and come equipped with internal double-speed, tray loading CD-ROM drive, built-in stereo speakers and a built-in 14inch Sony Trinitron colour display; prices go from $2,100 to $2,300.