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 Tenth Planet, The Tomb of the Cybermen, The Invasion, Attack of the Cybermen, Rise of the Cybermen|The Age of Steel, Doomsday, The Pandorica Opens, Closing Time, Nightmare in Silver, Death in Heaven, World Enough and Time|The Doctor Falls, The Haunting of Villa Diodati, Ascencion of the Cybermen|The Timeless Children, The Power of the Doctor; AUDIO: The Blue Tooth, Spare Parts, The Gathering, The Reaping, The Harvest, The Silver Turk, Human Resources, Master of Worlds; WC: Real Time; COMIC: The Flood, Supremacy of the Cybermen; PROSE: Made of Steel)

Many scientists of various species studied cybernetics, including Qataka, (PROSE: Timewyrm: Genesys) Dr Tanizaki, (TV: Cyberwoman) Professor Alistair Gryffen, (TV: Regeneration) Jarvis Bennett, (TV: The Wheel in Space) Charlie Duffy, (TV: Kerblam!) 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)