The IBM 3277 terminal was available in two models. Model 1 had a 40x12 character resolution and Model 2 had an 80x24 character resolution.
- Ken Shirriff. "IBM, sonic delay lines, and the history of the 80×24 display". http://www.righto.com/2019/11/ibm-sonic-delay-lines-and-history-of.html. Retrieved January 22, 2020.
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