Computer

Computers were machines made (or grown in some cases ) to perform tasks involving information processing, storage and retrieval. Computers could do calculations, break codes and perform almost any logical action. (TV: The War Machines)

In 1903, after receiving a wealth of information from the future, Grigori Rasputin foresaw the creation of the computer. (AUDIO: The Wanderer)

On Earth, computers were developed in the 20th century. In the 1960s computers like WOTAN were very large. (TV: The War Machines) Later, computers developed, so, by the early 21st century, a computer could fit in a lap and do much more than computers of the 1960s. (TV: Last of the Time Lords)

A computer could be linked with other computers to create an information network or "Internet". (TV: The War Machines) Computers were "very sophisticated idiots". They could do what they were told at incredible speeds, including killing their programmers before they could change their minds. (TV: Robot)

Human ships of the 26th century used computers with keyboard inputs. (TV: Earthshock)

Some computers achieved apparent self-awareness, like the computer Xoanon. (TV: The Face of Evil) The War Machines were computers that could move, having been programed by WOTAN. (TV: The War Machines)

The BOSS was a computer that achieved self awareness by connecting with a human mind. After learning that humans illogic was what made them unique, he ordered Stevens to program these qualities into him. Despite being self aware, he still exhibited many computer-like qualities. The Third Doctor distracted him by asking him a paradoxical question. (TV: The Green Death)

Mr Smith was usually referred to as a computer and performed similar functions, although he was actually a Xylok. He could interface with other computers remotely or via the Internet. (TV: Invasion of the Bane)