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Reference.org
Pilot (operating system)
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<p>Pilot is a single-user, <a href="/facts/Computer_multitasking/Q4acPNMv">multitasking</a> <a href="/facts/Operating_system/8XTuvMh2">operating system</a> designed by <a href="/facts/PARC_(company)/fh2Su0k9">Xerox PARC</a> in early 1977. Pilot was written in the <a href="/facts/Mesa_(programming_language)/etxwQkV5">Mesa</a> <a href="/facts/Programming_language/cWTYbgWa">programming language</a>, totalling about 24,000 <a href="/facts/Source_lines_of_code/eHbXB39X">lines of code</a>. </p>