Teletype Model 33

<p>The Teletype Model 33 was an <a href="/facts/Electromechanical/0D5gkXko">electromechanical</a> <a href="/facts/Teleprinter/pn5SQKTf">teleprinter</a> designed for light-duty office use. It was less rugged and cost less than earlier Teletype models. The <a href="/facts/Teletype_Corporation/dcsgSl36">Teletype Corporation</a> introduced the Model 33 as a commercial product in 1963, after it had originally been designed for the United States Navy. The Model 33 was produced in three versions:
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<ul><li>Model 33 ASR (Automatic Send and Receive), which has a built-in eight-hole <a href="/facts/Punched_tape/8HI7dThI">punched tape</a> reader and tape punch;</li>
<li>Model 33 KSR (Keyboard Send and Receive), which lacks the paper tape reader and punch;</li>
<li>Model 33 RO (Receive Only) which has neither a keyboard nor a reader/punch.</li></ul>
<p>The Model 33 was one of the first products to employ the newly standardized <a href="/facts/ASCII/vGUI33Qu">ASCII</a> character encoding method, which was first published in 1963. A companion Teletype Model 32 used the older, established five-bit <a href="/facts/Baudot_code/AuCf6WGf">Baudot code</a>. Because of its low price and ASCII compatibility, the Model 33 was widely used with early <a href="/facts/Minicomputer/g8hvpQxe">minicomputers</a>, and the large quantity of the teleprinter sold strongly influenced several <a href="/facts/De_facto_standard/TRELHVwI">de facto standards</a> that developed during the 1960s and 1970s.
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Teletype Model 33 open-in-new

Teletype Model 33