glass tty
/glas T-T-Y/ or /glas ti'tee/ A terminal 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" for an interesting true story
about a glass tty.
Nearby terms:
glass « glass box testing « glassfet « glass tty
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