TeleTYpe Writer (commonly abbreviated as TTY), also known as a text telephone or a Telecommunication Device for the Deaf (TDD), is a device which allows people who are deaf, speech impaired, or hard of hearing to type messages to anyone else who has a TTY, using a telephone line.
- The TTY demystified: http://www.linusakesson.net/programming/tty/
- Use my phone with a TTY: www.microsoft.com/windowsphone/en-us/howto/wp7/basics/use-my-phone-with-a-tty.aspx
- wikipedia: Teleprinter (also related is the term "TeleTypewriter")
- wikipedia: Telecommunications device for the deaf
- What does “TTY” stand for?: https://askubuntu.com/questions/481906/what-does-tty-stand-for