The telephone wasn't invented in the thirties, but the thirties represents a time in history when the world was changing incredible fast and much of that change was made possible by the telephone. Without the telephone, progress would have been much slower and people might not have been so receptive to change. We owe a great deal to Alexander Graham Bell, the inventor of the telephone- and further developed by many others- for his invention has served mankind well and will continue to offer society a valuable service for years to come.A telephone, or phone, is a telecommunications device that converts sound, typically the human voice, into electronic signals suitable for transmission via cables or other transmission media over long distances. Telephones became quickly indispensable to businesses, government, and households, and are some of the most common appliances in the developed world since then. The word telephone, which has been adapted to many languages, is derived from the Greek: , tle, far and , phn, voice, together meaning distant voice.