TTY may refer to:

Communications and technology

Teleprinter A teleprinter (teletypewriter, teletype or TTY) is an electromechanical device that can be used to send and receive typed messages through various communications channels, in both point-to-point and point-to-multipoint configurations. Initia ...

or teletypewriter (TTY), an electromechanical typewriter paired with a communication channel ** Sometimes used more generally for any type of computer terminal ** Sometimes used for a

virtual console A virtual console (VC) – also known as a virtual terminal (VT) – is a conceptual combination of the keyboard and display for a computer user interface. It is a feature of some Unix-like operating systems such as Linux, BSD, illumos, Unix ...

, typically accessed by ++ and identified as tty1, tty2, tty3, etc. * Another name for a

telecommunications device for the deaf A telecommunications device for the deaf (TDD) is a teleprinter, an electronic device for text communication over a telephone line, that is designed for use by persons with hearing or speech difficulties. Other names for the device include tel ...

(TDD), a teleprinter designed for persons with hearing or speech difficulties *

tty (Unix) In computing, tty is a command in Unix and Unix-like operating systems to print the file name of the terminal connected to standard input. tty stands for TeleTYpewriter. Usage The tty command is commonly used to check if the output medium is a ...

, a command found in

Unix-like A Unix-like (sometimes referred to as UN*X or *nix) operating system is one that behaves in a manner similar to a Unix system, although not necessarily conforming to or being certified to any version of the Single UNIX Specification. A Unix-li ...

operating system An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs. Time-sharing operating systems schedule tasks for efficient use of the system and may also in ...

Other uses

* Tampere University of Technology (Tampereen Teknillinen Yliopisto), in Finland * Torque-to-yield fastener {{Disambiguation