glass tty: /glas T-T-Y/ or /glas ti'tee/ n. 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" (Appendix A) for an interesting true story about
a glass tty.
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