This book examines the main legal considerations surrounding computer software and hardware and their maintenance, distribution and marketing. It contains real computer contracts to illustrate points made and there are over 200 pages of precedents. This edition has been revised to take account of developments such as the Copyright, Designs and Patents Act 1988. It contains a new chapter and accompanying precedent advising on "in field" and customer test agreements. Coverage of shrink wrap has been expanded to include a shrink wrap licence precedent and the chapter on computer leases updated to consider the implications of the Capital Allowances Act 1990 on finance leasing.