Teletype Model 33 ASR teleprinter, with punched tape reader and punch, usable as a computer terminal
The Teletype Model 33 is an electromechanical teleprinter designed for light-duty office use. It is less rugged and cost less than earlier Teletype models. The Teletype Corporation introduced the Model 33 as a commercial product in 1963,[1] after it had originally been designed for the United States Navy.[2] The Model 33 was produced in three versions:[3]
Model 33 ASR (Automatic Send and Receive), which has a built-in eight-hole punched tape reader and tape punch;
Model 33 KSR (Keyboard Send and Receive), which lacks the paper tape reader and punch;
Model 33 RO (Receive Only) which has neither a keyboard nor a reader/punch.
The Model 33 was one of the first products to employ the newly standardized ASCII character encoding method, which was first published in 1963. A companion Teletype Model 32 used the older, established five-bit Baudot code. Because of its low price and ASCII compatibility, the Model 33 was widely used with early minicomputers, and the large quantity of the teleprinter sold strongly influenced several de facto standards that developed during the 1960s and 1970s.
^"Auerbach Guide to Alphanumeric Display Terminals", Auerbach Publishers, 1975
^"A Synopsis of Teletype Corporation History" (PDF).
^Cite error: The named reference tv_typewriter was invoked but never defined (see the help page).
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that emulated a Model33Teletype. This reflects the fact that early character-mode terminals were often deployed to replace teletype machines as a way...
such systems, but one based on a 20 mA current level was used by the TeletypeModel33 and was particularly common on minicomputers and early microcomputer...
used. Other defensible choices could be ⤺, ↰, ⮢, ⮪, ⮌ or ⮏. On the TeletypeModel33 TAPE and TAPE would control the tape punch, whereas XON and XOFF would...
EBCDIC. In the 1960s, DEC routinely disabled the answerback feature on TeletypeModel33 terminals because it interfered with the use of the paper-tape reader...
the development of the personal computer. The first terminal was a TeletypeModel33 connected to the SDS 940 computer by telephone, using a 10 character...
northwest arrow (⎋). The name of the equivalent key on some early TeletypeModel33 keyboards was labeled Alt Mode..., the alternative mode of operation...
many ASCII graphic sets descended from the default typewheel on the TeletypeModel33. The use of the slashed zero by many computer systems of the 1970s...
browsers. The escape key was part of the standard keyboard of the TeletypeModel33 (introduced in 1964 and used with many early minicomputers). The DEC...
telegraph system but became popular on computers due to the early use of TeletypeModel33's as ad hoc terminals. A standard 25-pin D-connector was also provided...
popular peripherals only implemented a 64-printing-character subset: TeletypeModel33 could not transmit "a" through "z" or five less-common symbols ("`"...
many early computer terminals, including the TeletypeModel33 ASR and Lear-Siegler ADM-3A, and early models of the IBM PC, positioned the Control key on...
from telegraph code. Its first commercial use was in the TeletypeModel33 and the TeletypeModel 35 as a seven-bit teleprinter code promoted by Bell data...
for processing, and a Datanet-30 realtime processor to handle the TeletypeModel33 teleprinters used for input and output. A team of a dozen undergraduates...
connections from up to 2000 terminals throughout the state, most of them TeletypeModel33 teleprinters, connected at 110 and 300 baud through telephones by...
school used proceeds from Lakeside School's rummage sale to buy a TeletypeModel33 ASR terminal and a block of computer time on a General Electric (GE)...
provide four generic "device control" characters (DC1 through DC4). The TeletypeModel33 ASR adopted two of these, DC3 and DC1, for use as XOFF and XON, respectively...
TELCOMP programs were normally input via a paper tape reader on a TeletypeModel33, which would be connected to a PDP via a modem and acoustic telephone...
turned to the existing mass-produced ASCII teleprinters (primarily the TeletypeModel33, capable of ten ASCII characters per second throughput) as a low-cost...
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