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TTY, in electronic or electromechanical communications, was used to refer to "teletype" or perhaps "teletypewriter", but it has come to refer to any type of text terminal. TTY may also refer to:

Electronic or electromechanical communications[edit]

  • Teleprinter, also called a teletypewriter (TTY), an electromechanical typewriter paired with a communication channel
    • Telecommunications device for the deaf (TDD), a teleprinter designed for persons with hearing or speech difficulties
    • Text terminal, teleprinter replacement, a serial computer interface for text entry and display
    • Terminal emulator, teleprinter replacement, a program that emulates a video terminal within some other display architecture
    • getty (Unix); the so-called TTYs on Linux, allowing switching between X window system and command-line interface


  • Torque-to-yield fastener, a type of fastener that is intentionally elongated during installation to prevent it from loosening over time


  • Tampere University of Technology (Tampereen Teknillinen Yliopisto), the second largest engineering university in Finland, located in Tampere, center of Southern Finland


  • Thick target yield