Hyper CELL: an electronic companion to molecular biology of the cell (alberts et al.): Garland Publishing, New York. $1000, plus $500 a year for updates. System requirements: Macintosh SE, SE/30, II H or IIc, 2 Mbyte of RAM, 8 Mbyte of hard disk space, system version 6.02 or 6.03, Hypercard version 1.2.2 and Home Stack. Works in both colour and black and white, referenced with page numbers to the ‘Molecular Biology of the Cell’, Second Edition. Demo disk available on request (reviewed here). Individual student guide disks available.