Alan Freedman -- The Computer Language Company - Computer Desktop Encyclopedia
Computer Desktop Encyclopedia
Longest-Running Tech Reference on the Planet

A CDE Definition

You'll love The Computer Desktop Encyclopedia (CDE) for Tech Term of the Day (TTOD)

LOOK UP ANOTHER TERM


FreeDOS

An open source, MS-DOS operating system that is capable of running most DOS applications. FreeDOS manages memory better than the original operating system and includes long file name support. The project was initiated in 1994 by Jim Hall when Microsoft stopped selling MS-DOS separately as it prepared to release Windows 95. Numerous pre-release versions of FreeDOS were available prior to the official Version 1.0 launch in 2006. For more information, visit www.freedos.org. See DOS.



DOS

(1) See denial of service.

(2) (Disk Operating System) Any operating system that supports hard drives. See operating system.

(3) (Disk Operating System) A family of IBM mainframe operating systems (DOS, DOS/370, DOS/VS, DOS/VSE). As disk storage became accepted in the late 1960s, DOS started out as a variant of IBM's Tape Operating System (TOS); however, it was always the "junior partner" to OS/360 and its progeny. See DOS/VSE.

(4) (Disk Operating System) Pronounced "dahss." A single-user operating system from Microsoft for Intel x86 personal computers. It was the first operating system for IBM PCs and IBM-compatible PCs, and it remained the underlying control program for Windows 3.1, 95, 98 and ME. Subsequent versions of Windows incorporated all DOS functionality, and most DOS commands work the same in Windows. See cmd abc's.

PC-DOS and MS-DOS
The OS in the IBM PC was PC-DOS, and the OS used by all other PC makers was MS-DOS. Except for DOS 6, which contained different utilities, PC-DOS and MS-DOS commands and system functions were the same, and all PC-DOS and MS-DOS versions were commonly called "DOS." See DOS 6.

DOS Lives On
In various incarnations, DOS is still used in embedded systems, where a small OS footprint is required. Examples are Digital Research's DR-DOS, ROM-DOS from DataLight (www.datalight.com) and the open source FreeDOS. See embedded system.



Personal Use Only

Before/After Your Search Term
BeforeAfter
free spacefreeform fabrication
free space opticsfreeform manufacturing
Free Standards GroupFreeHand
free-textFreelance Graphics
free to air TVFreeman Reports
Freebasefreemium
FreeBSDFreenet
freedbFreespire
Freedman's lawFreestyle
Freedom to ConnectFreeSync

Terms By Topic
Click any of the following categories for a list of fundamental terms.
Computer Words You Gotta KnowSystem design
Job categoriesUnix/Linux
Interesting stuffPersonal computers
InternetIndustrial Automation/Process Control
Communications & networkingAssociations/Standards organizations
HistoryDesktop publishing
Audio/VideoGraphics
MainframesSecurity
ProgrammingHealthcare IT
System design