Chip-based instrumentation for beginners‘‘Design of Microcomputer-based Medical Instrumentation’’Edited by Willis J. Tompkins and John G. Webster, 1981, Prentice-Hall International, Hemel Hempstead, pp xiii + 495,£18.15, ISBN 13 201244 8.Mixed bag of medical laser applications‘‘Lasers in Medicine’’Edited by Hans K. Koebner, 1981, Wiley&Sons, Chichester, pp 274,£39.50, ISBN 0 471 27602 2.