Line command

Line commands are methods, considered primitive by 2552 standards, of communicating with human computers by way of a keyboard, circumventing any graphical interface. Although most humans have long since forgotten them, their use still exists and is practiced by certain learned individuals such as Dr. Catherine Halsey. Dr. Halsey researched line commands for her second doctoral thesis, which she was later able to use to destroy the hostile AI Araquiel.

Trivia

 * Line commands are probably a reference to modern command line interfaces.