Computing
- Modes (Unix), permissions given to users and groups to access files and folders on Unix hosts
- Mode (computer interface), distinct method of operation within a computer system, in which the same user input can produce different results depending of the state of the system
- A game mode, a mode used as a game mechanic in videogames
- a DOS and Windows command line tool for configuration of devices and the console
- Asynchronous Transfer Mode, a method of digital communication
- data types in some programming languages (e.g. EL/1)
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