Training in telecommunications, 1941. British RAF personnel in the classroom during the Second World War: 'Class work...in properly equipped rooms, is used for instruction in such things as visual signalling, learning the Morse code in the "buzzer" classes, and in wireless transmission. A foundation in signalling methods is laid at the Initial Training Wing'. From "The Royal Air Force in Pictures", 2nd edition, by World War I flying ace Major Oliver Stewart. [Country Life Ltd, London, 1941]