Book excerpt: This Volume Presents The Basic Details Of Digital Integrated Circuits, The Processing Of Signals For Digital Communication, The Working Principles Of Electronic Digital Telephone Exchanges, Fibre Optic Communications And Radio Systems Including Those Working On Microwaves. It Further Describes The Working Principles Of Radar, Telephoto And Tv Systems Including Colour Tv. It Highlights Also The Principles Of Satellite Communication And The Launching Of Satellite Repeaters. In Addition The Book Explains The Working Principles Of Cellular Radio Mobile Telephone System And Paging Services. Several Worked-Out Examples And Model Questions Have Also Been Included For Self-Study.