DOS

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

DOS

Abbreviation for date of service.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
It operated using DOS operating system. You had to type in "$500" to get it to boot up.
IRis[R] runs in a Windows or DOS operating system. The program was installed on individual PCs at two sites and on a pre-existing PC network central server at the third site.
At that time, the lab ran the Pathfinder learning management system on a DOS operating system. With the switch to Windows, the center received special funding from the district and put together a team to develop multimedia-rich Pathware courses using CD-ROMs, the Internet, and numerous software applications, together with text supported material.
Hence, VisiCalc did a poor job of adapting its product to the DOS operating system, allowing Lotus 1-2-3 to dominate; Lotus lagged in adjusting its product to the Macintosh operating system and to Windows, allowing Microsoft Excel to take over.
In a 32-bit world, many property managers continue toiling away on 8-bit programs desperately clinging to a near extinct DOS operating system.