IBM 2741

IBM 274027412741 Selectric teletypewriterTypewriter
The IBM 2741 is a printing computer terminal that was introduced in 1965.wikipedia
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Computer terminal

terminalterminalsdumb terminal
The IBM 2741 is a printing computer terminal that was introduced in 1965.
Keyboard/printer terminals that came later included the IBM 2741 (1965) and the DECwriter LA30 (1970).

APL (programming language)

APLAPL programming languageA Programming Language
It was influential in the development and popularity of the APL programming language.
This was used on paper printing terminal workstations using the Selectric typewriter and typing element mechanism, such as the IBM 1050 and IBM 2741 terminal.

IBM Selectric typewriter

IBM SelectricSelectricIBM Selectric Composer
The IBM 2741 combines a ruggedized Selectric typewriter mechanism with IBM SLT electronics and an RS-232-C serial interface.
The MC/ST was also available in a "communicating" version that could emulate an IBM 2741 terminal or run its native Correspondence Code.

IBM System/360

System/360IBM 360IBM/360
It was used primarily with the IBM System/360 series of computers, but was used with other IBM and non-IBM systems where its combination of higher speed and letter-quality output was desirable. and so were frequently used as console devices for computers such as the IBM 1130 and IBM System/360.

IBM Administrative Terminal System

ATS1440/1460 Administrative Terminal System
The 2741 was initially developed and marketed for use with the IBM Administrative Terminal System (ATS/360).
Initially, ATS/360 supported only IBM 2741 typewriter terminals.

Serial port

serialserial portsserial line
The IBM 2741 combines a ruggedized Selectric typewriter mechanism with IBM SLT electronics and an RS-232-C serial interface.
Also possible, but rarely used, is "big endian" or MSB (most significant bit) first serial communications; this was used, for example, by the IBM 2741 printing terminal.

IBM 1050

IBM 105210521052 console typewriter
It supplanted the earlier IBM 1050, which was more expensive and cumbersome, in remote terminal applications.

BCL Molecular

BCL Molecular 18Business Computers Ltd
For example, a 2741-type mechanism formed the principal user interface for a series of machines from the 1960s and 1970s built in the United Kingdom by Business Computers Ltd.

IBM 3767

The IBM 3767 terminal, which used a dot-matrix printer capable of 80 or 120 char/s, was an alternative replacement.
For such purposes, printer terminals such as IBM 2741 printer, using the traditional asynchronous serial communication (start-stop signaling), and display terminals such as IBM 2260 and IBM 3270, using the new communications protocol set (Binary Synchronous Communications or BSC), became available.

Teleprinter

teletypeteletypewritertelex
Compared to the teletypewriter machines that were commonly used as printing terminals at the time,

Daisy wheel printing

daisy wheel printerdaisy wheeldaisywheel printer
primarily by printing terminals using daisy wheel mechanisms.

IBM

International Business MachinesIBM CorporationInternational Business Machines Corporation
The IBM 2741 combines a ruggedized Selectric typewriter mechanism with IBM SLT electronics and an RS-232-C serial interface.

IBM Solid Logic Technology

Solid Logic TechnologySLTIBM SLT
The IBM 2741 combines a ruggedized Selectric typewriter mechanism with IBM SLT electronics and an RS-232-C serial interface.

RS-232

RS232RS-232Cserial
The IBM 2741 combines a ruggedized Selectric typewriter mechanism with IBM SLT electronics and an RS-232-C serial interface.

Parity bit

parityeven parityparity check
It operates at about 14.1 characters per second with a data rate of 134.5 bits/second (one start bit, six data bits, an odd parity bit, and one and a half stop bits).

ASCII

US-ASCIIAmerican Standard Code for Information InterchangeASCII code
In contrast to serial terminals employing ASCII code, the most significant data bit of each character is sent first. The 2741 and similar Selectric-based machines were supplanted by ASCII terminals using the Xerox Diablo 630 "daisy wheel" and similar print mechanisms where hard copy was required.

IBM 1130

11301130 computing systemVariations
and so were frequently used as console devices for computers such as the IBM 1130 and IBM System/360.

Break key

Pause keyBreakBreak (Pause)
(The break key on ASCII terminals works the same way: continuous spacing is a "break condition" used to signal the remote end of an interruption.)

ALGOL 68

Algol68ALGOL-68GOST 27974-88
Similar to APL, ALGOL 68 was defined with a large number of special characters.

Xerox

Xerox CorporationXerox Corp.Haloid Company
The 2741 and similar Selectric-based machines were supplanted by ASCII terminals using the Xerox Diablo 630 "daisy wheel" and similar print mechanisms where hard copy was required.

Diablo 630

630
The 2741 and similar Selectric-based machines were supplanted by ASCII terminals using the Xerox Diablo 630 "daisy wheel" and similar print mechanisms where hard copy was required.

Hard copy

hardcopyhard-copySoft copy
When hard copy wasn't needed, video terminals often replaced them.

Universal asynchronous receiver-transmitter

UARTuniversal asynchronous receiver/transmitter16450 UART
In most applications the least significant data bit (the one on the left in this diagram) is transmitted first, but there are exceptions (such as the IBM 2741 printing terminal).

List of security hacking incidents

Timeline of computer security hacker historyTimeline of hacker historymany examples of computer systems that have been hacked
In the Fall of 1967, IBM (through Science Research Associates) approached Evanston Township High School with the offer of four 2741 Selectric teletypewriter based terminals with dial-up modem connectivity to an experimental computer system which implemented an early version of the APL programming language.

CICS

Customer Information Control SystemCICS Transaction ServerIBM Customer Information Control System
CICS originally only supported a few IBM-brand devices like the 1965 IBM 2741 Selectric (golf ball) typewriter based terminal.