| Subject | English | French |
| IT | asynchronous TTY-terminal | terminal télétype fonctionnant en mode asynchrone |
| commun., IT | MTI/TTY channel | canal MTI/TTY |
| comp., MS | TTY/TDD | TTY/ATS (A device that enables the transmission of typed messages over phone lines. These devices typically include keyboards for typing messages to send and display and/or printers to receive messages from one device to another) |