= G =
glass tty /glas T-T-Y/ or /glas ti'tee/ n.
that has a display screen but which, because of hardware or
software limitations, behaves like a teletype or some other
printing terminal, thereby combining the disadvantages of both:
like a printing terminal, it can't do fancy display hacks, and like
a display terminal, it doesn't produce hard copy. An example is
the early `dumb' version of Lear-Siegler ADM 3 (without cursor
control). See tube, tty; compare dumb terminal,
smart terminal. See "TV Typewriters" (Appendix
A) for an interesting true story about a glass tty.
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.