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, smartterminal. See "TV Typewriters" for an interesting true

story about a glass tty.