The Lear Siegler ADM-3A terminal (1976) looks like it's straight out of The Flintstones We received it 12 years ago from the Faculty of Mechanical Engineering, and it dates back to the times before the influential VT100 terminal.

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For a long time, the de facto ‘text’ data format included the Select Graphic Rendition (SGR) control sequences.

In practice, SGR control sequences were as much ‘text’ as the carriage-return, form-feed, horizontal-tab, line-feed, vertical-tab control codes are ‘text’.

SGR control sequences gave us things such as — bold, color, italics, overlining, underlining, etc.