Desktop molecular modeller: by M James, C Crabbe and JR Appleyard. Oxford University Press. 1989. A program for molecular graphics on IBM PC, XT, AT or PS/2 microcomputers or full compatibles. Includes manual and one 3.5 inch or two 5.25 inch floppy disks. Essential requirements are 512k RAM minimum, DOS version 2.0 or higher and almost any graphics adaptor. Maths co-processor and MS-DOS standard mouse are optional, £7300/$595: 50% discount for educational users