High Quality Content by WIKIPEDIA articles! The ADM-3A was one of the first computer terminals manufactured by Lear Siegler, first produced in 1975. It had a 12 inch screen displaying 12 or 24 lines of 80 characters.Originally priced at $1195, a DIY kit later sold for $995. At first only allowing capital letters as ADM-3; the model was quickly supplanted by the more advanced version with both lower case, and uppercase. Further optional add-ons included a graphics card enabling it to emulate a Tektronix 4014 and an extension port which would allow daisy chaining several ADM-3As on a single RS-232 line.

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