Gives 1051 Terms in French, English, German, Spanish, Italian, Dutch, Polish, Swedish with their definitions in French and English subdivided into the following sections: general (fundamental terms: 100; noise and distortion: 31; systems: 18; networks: 75; apparatus: 85; lines: 33; pulse techniques: 61; speech testing and acoustics: 12; measuring instruments: 7), telegraphy (general: 4; systems: 37; traffic ans operating terms: 33; codes: 18; telegraph transmission terms: 51; apparatus and equipment: 47; fascimile: 42), telephony (subscribers' stations and equipment: 35; excahanges and positions: 51; exchange equipment: 72; repeater stations: 14; systems and circuits: 102; trunking terms: 64; alternating current signalling: 48; miscellaneous: 11).