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 ?
In those days, with few exceptions, the software was designed to work on the disk operating system (DOS).
The nation's biggest-selling computer disk operating system (translation for DOS), which is celebrating its 10th anniversary, has quashed rumors of its anticipated obsolescence.
S/T 3 requires an IBM PC with 128K, of main storage, at least one floppy-disk drive, an 80-character display, and an IBM Disk Operating System.