Shared Variables

<p>Shared Variables are a feature of the programming language <a href="/facts/APL_/E2sb98gC">APL</a> which allows APL programs running on one <a href="/facts/Processor_(computing)/z3wPljrI">processor</a> to share information with another processor. Although originally developed for <a href="/facts/Mainframe_computer/nrBR6rWa">mainframe computers</a>, Shared Variables were also used in <a href="/facts/Personal_computer/koaYfNce">personal computer</a> implementations of APL. Shared Variables could be used to control <a href="/facts/Peripheral_device/3lEBPE14">peripheral devices</a>, or to communicate with external files, <a href="/facts/Database/VYcpkevb">database</a> management systems, or other users.  Shared Variables were first introduced by International Business Machines Corporation (<a href="/facts/IBM/QszA7nwd">IBM</a>) in their APL.SV <a href="/facts/Software/RP79lVSW">software</a> product in 1973, and are still available as of 2017<a href="https://en.wikipedia.org/w/index.php?title=Shared_Variables&action=edit">[update]</a>, in APLs from IBM and Dyalog, for the operating systems <a href="/facts/Linux/9FvCKSTq">Linux</a> and <a href="/facts/Microsoft_Windows/bwhAhuSL">Windows</a>.
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Shared Variables open-in-new

Shared Variables