Telephone number
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A telephone number is the address of a telecommunication endpoint, such as a telephone, in a telephone network, such as the public switched telephone network. A telephone number typically consists of
A Swiss rotary telephone dial from the 1970s showing the telephone's number (94 29 68), along with those of various local emergency services
Telephone numbers for sale in Hong Kong
A business card from Richard Nixon's first Congressional campaign in 1946. His telephone number can be seen as "Whittier 42635".
Face of a 1939 rotary dial showing a 2L-4N style alphanumeric telephone number LA-2697
History of the telephone
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This history of the telephone chronicles the development of the electrical telephone, and includes a brief overview of its predecessors. The first telephone patent was granted to Alexander Graham Bell
Actor portraying Alexander Graham Bell in a 1932 silent film. Shows Bell's second telephone transmitter (microphone), invented 1876 and first displayed at the Centennial Exposition, Philadelphia.
Bell prototype telephone stamp Centennial Issue of 1976
Innocenzo Manzetti considered the idea of a telephone in 1844
Antonio Meucci, 1849, developing a voice-communication apparatus that several sources credit as the first telephone.