Welcome to the alphabetical walkthrough of pioneers and personalities. You're now on letter T. Click through the rest of the alphabet to find out more about the people who've helped shape telecommunication as we know it today.
Sir Stephen Tallents was an advertising high-flier of the 1930s, who possibly did more than anyone else to expand the market for the telephone.
John Tasker was responsible for opening the first telephone exchange in Sheffield.
Ray Tomlinson created one of the biggest communications phenomena almost by accident - e-mail.
Roy Trubshaw along with Richard Bartle created the first true multi user computer game known as MUD (multi user dungeon) in 1978.
He was a programmer at Exeter University.
Alan Turing was the first man to propose building an intelligent machine to recreate thought - in short, the computer.
Visit the updated Communicate! galllery at the National Museum of Scotland.
Discover the records behind the history of telecommunications as BT Heritage launches online catalogue.
Last month: History of the internet learning resource
Gallery: From buttons to bytes
Fun activity: BT Tower activity
Search: History of computers
