DOS

(redirected from DOS operating system)
Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.
Related to DOS operating system: Windows operating system

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 ?
basics of Microsoft DOS operating system and Microsoft Windows 3.
The biggest change is the accelerating swing from the DOS operating system to Windows.
This is an opportunity to sell RAM [random access memory], and to sell to those consumers who were so intimidated by the DOS operating system.
The "Exit" option takes the user to the previous menu, in this case to the DOS operating system.
The other advantage: Users can easily upgrade their machines to Windows rather than replace the DOS operating system.
With the move more and more to standard operating systems, the choice for personal computer workstations is the DOS operating system while the choice for multi-tasking and multi-user workstations is UNIX.
Basic Certificate Course for 200 persons/students with Computer fundamental, DOS Operating System, Windows OS, Internet, MS-Word, Excel, Power Point, on Window7 or 8.