Computer science

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) 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)