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.
