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Pseudoterminal
In some operating systems, including Unix, a pseudoterminal, pseudotty, or PTY is a pair of pseudo-devices, one of which, the ''slave'', emulates a real text terminal device, the other of which, the ''master'', provides the means by which a terminal emulator process controls the slave.
== History ==
Pseudoterminals were present in the DEC PDP-6 Timesharing Monitor at least as early as 1967, and were used to implement batch processing.〔()〕 They are described in the documentation for the succeeding TOPS-10 on the PDP-10.〔(''PDP-10 Timesharing Monitors Programmer's Reference Manual'' ) section 5.10〕 Other DEC operating systems also had PTYs, including RSTS/E for the PDP-11, as did the third-party TENEX operating system for the PDP-10.
Unix pseudoterminals originated in 1983 during the development of Eighth Edition Unix and were based on a similar feature in TENEX. They were part of the 4.2 release of BSD. AT&T's System V included support for pseudoterminals as a driver in their STREAMS device model, along with the pseudoterminal multiplexer.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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