Cybernetics

Cybernetics was a science concerned with the control mechanisms of machines. (TV: Four to Doomsday) It was known on Gallifrey, indeed studied and applied by the Doctor (TV: Destiny of the Daleks) and Drax. (TV: The Armageddon Factor)

Cybernetics was involved with the functioning of the Cybermen. (TV: The Tomb of the Cybermen)

Many scientists of various species studied cybernetics, including Qataka, (PROSE: Timewyrm: Genesys) Dr Tanizaki, (TV: Cyberwoman) Professor Alistair Gryffen, (TV: Regeneration) Davros (AUDIO: The Juggernauts) and Nyssa of Traken. (TV: Four to Doomsday)

Other references
The Aja'ib contained tales involving cybernetics. (PROSE: Bafflement and Devotion)