DOS

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DOS

[dos]
abbreviation for disk operating system. A generic term describing an operating system loaded from disk devices, the hard drive in modern computers, when the system is started or rebooted.

DOS

Abbreviation for date of service.
References in periodicals archive ?
CBL Data Shredder is currently available in two versions: one for Microsoft Windows XP and one for FreeDOS in the form of a downloadable floppy maker with which users can boot their systems.
Operating Systems - Linux, FreeBSD, FreeDOS, Haiku, Menuet
DELL has found a solution to the problem by shipping naked computers with a copy of FreeDOS in the box to satisfy the Microsoft licensing police.