This is a collection of data for the traditional and modern radio amateur and the high-tech listener. Familiar radio topics are covered concisely (for example, abbreviations and codes, symbols, formulae and frequencies), and there are sections which deal with the newer features of the ham world - AMTOR, packet radio, slow scan TV, computer decoding, airband and maritime glossaries and so on. Based on the Radio Amateur and Listener's Pocket Book, this handbook has been completely rewritten and expanded to include new chapters on broadcast listening, instruments and interference.