Computer science
From Tardis Wiki, the free Doctor Who reference
Computer science was an area of studies.
According to the Celestial Intervention Agency's information, the Master, when he still lived on Gallifrey, acted a teacher of computer science and mathematics at the Prydonian Academy. (PROSE: CIA File Extracts) The Spy Master later displayed an affinity for the field, successfully hacking into the Matrix as a form of "play" (TV: The Timeless Children) and teaming up with the Kasaavin to study computer experts (and spies) up and down Earth's history. (TV: Spyfall)
Before the Time War disrupted history, Bliss studied robotics and computer science. (AUDIO: Companion Piece)