A telephone is an electric tool.Using a telephone,two people who are in different places can talk.Early telephones needed to be connected with wires.Now telephone calls can be sent with radio.This is called wireless.
Most people believe that it was invented in 1876 by Alexander Graham Bell.He was a 29-year old Scotsman living in the USA.In 2002 the US Congress agreed that Antonio Meucci developed and patented a working telephone in the USA in 1871.This was five years earlier than Bell.Meucci was unable to find someone to provide him with the money to finance his project.His wife was sick and had to stay in bed.Meucci invented his "teletrofono" to talk to her while he worked in his workshop.
There are many types of telephone.A telephone that you can carry around with you is called a mobile phone.These became popular in the late 1980s.
Computers can use a machine called a modem to talk to other computers over a telephone line.This allows a computer to connect to other computer networks including the Internet.
