Covers all the digital electronic requirements of the BTEC courses in electronic, electrical, computing and communication engineering at levels II and III, and related City and Guilds courses. This fourth edition has been revised and updated to cover the recent developments in the field. Diagrams have been enlarged for improved clarity and the text has been completely reset. Key Features - Provides a comprehensive introduction to modern digital electronics. Uses the new International Electrotechnical Commission (IEC) standard symbols for logic devices. Coverage includes the use of MSI devices such as counters and multiplexes, semiconductor memories, and both analogue-to-digital and digital-to-analogue converters. Exercises with selected answers help the reader with revision. It is aimed at second and third level BTEC and City and Guilds Level as well as at first year undergraduates.