Later versions of CP / M ( as well as Concurrent CP / M, Concurrent DOS, DOS Plus, Multiuser DOS, System Manager and REAL / 32 ) come with an XIOS ( Extended Input / Output System ) instead of the BIOS.

Most versions of DOS have a file called " IO. SYS ", " IBMBIO. COM ", " IBMBIO. SYS ", or " DRBIOS. SYS "; this file is known as the " DOS BIOS ", which is analogous to the " CP / M BIOS ".

Mature versions of the Commodore, SWTPC, Atari and Apple home computer systems all featured a disk operating system ( actually called ' DOS ' in the case of the Commodore 64 ( CBM DOS ), Atari 800 ( Atari DOS ), and Apple II machines ( Apple DOS )), as did ( at the other end of the hardware spectrum, and much earlier ) IBM's System / 360, 370 and ( later ) 390 series of mainframes ( e. g., DOS / 360: Disk Operating System / 360 and DOS / VSE: Disk Operating System / Virtual Storage Extended ).

Doom became a " killer app " that all capable consoles and operating systems were expected to have, and versions of Doom have subsequently been released for the following systems: DOS, Microsoft Windows, Linux, Apple Macintosh, Super NES, Sega 32X, Sony PlayStation, Game Boy Advance, iOS, Symbian OS, RISC OS, Atari Jaguar, Sega Saturn, Nintendo 64, Tapwave Zodiac, 3DO, Xbox, and Xbox Live Arcade.

* DOS graphics library ( Euphoria language versions up to and including 3. 1. 1 )

However, Edlin is included in 32-bit versions of Windows NT, since NTVDM's DOS support is based on MS-DOS version 5. 0.

1: Edlin: The only text editor in early versions of DOS.

1: Edlin: The only text editor in early versions of DOS.

It was cleanly programmed and relatively bug-free, as well as speed gained from being written completely in x86 assembly language ( this remained the case for all versions until 4. 0 when Lotus switched to C ) and wrote directly to video memory rather than use the slow DOS and / or BIOS text output functions.

There are versions of the True BASIC compiler for DOS, Windows, and " classic " Mac OS.

Several versions of XyWrite for DOS and Windows were also localized for use in European countries.

Borland has released three old versions of Turbo Pascal free of charge because of their historical interest: the original Turbo Pascal ( now known as 1. 0 ), and versions 3. 02 and 5. 5 for DOS.

Most versions of MS-DOS worked with the 1000 HX, including DOS 3. x, and some later versions.

A number of computers based on the 8086 and 8088 processors were manufactured during this period, but with different architecture from the IBM PC, and with their own versions of DOS and CP / M-86.

WordStar is a word processor application, published by MicroPro International, originally written for the CP / M operating system but later ported to DOS, that enjoyed a dominant market share during the early-to mid-1980s.

As a product enhancement, in the late 1980s WordStar 5 came bundled with PC-Outline, a popular DOS outliner then available from Brown Bag Software, Inc. in California.

( OS / 2 can run WordStar in a DOS session.

Designed to work in conjunction with CtrlPlus, the Command Emulator adds many more WordStar commands to MS Word than CtrlPlus by itself, and also changes Word 97-XP's menus to be more like those of WordStar 7. 0 for DOS, the last DOS version of WordStar.

* DOS WordStar files by default have no extension ; some users adopted their own conventions, such as the letters WS followed by the version number ( for example, WS3 ), or just plain WS.

* WordStar 2000 for DOS and UNIX PC do not have a fixed extension but DOC and WS2 were common

MicroPro was weakening with old Wordstar products and still-new WordStar 2000 ; WordPerfect was having problems with the translation and the user interface ; and MS-Word was a decent but less polished or powerful product, and was also DOS and text-based.

The DOS word processor market was dominated by programs like WordStar and WordPerfect.

The Apple II disk operating system, known simply as DOS, thus intercepted all input typed at the BASIC command prompt to determine whether it was a DOS command.

Additionally, in some kernels ( e. g. miscellaneous DOS variants ) is detected only at the time OS tries reading from a keyboard buffer and only if it's the only key sequence in the buffer, while is often translated instantly ( e. g. by INT 1Bh under DOS ).

Like the 1571, its built-in DOS provided a data burst mode for transferring data to the C128 computer at a faster speed than a 1541.

Most home computer DOS ' es were stored on a floppy disk always to be booted at start-up, with the notable exception of Commodore, whose DOS resided on ROM chips in the disk drives themselves ( the computer itself had no DOS, just a form of a BIOS for communicating with peripherals ).

The Lt. Kernal hard disk subsystem for the Commodore 64 and Commodore 128 models stored its DOS on the disk, as is the case with modern systems, and loaded the DOS into RAM at boot time.

* Manuals of Dragon 32, Dragon 64 and DragonDOS ( DOS 437 character set ) at www. museo8bits. es

At DAIMI, the CS department at Aarhus University, three CS students, avid players of XPilot and of Sid Meier's Civilization, which was a stand-alone PC game for DOS, decided to find out whether the two could be fused into an X-based multiplayer Civilization-like strategy game.

CP / M-86 shipped a few months later at $ 240, but sold poorly against DOS.

The hiring of Dave Cutler, former VMS architect, in 1988 created an immediate competition with the OS / 2 team, as Cutler did not think much of the OS / 2 technology and wanted to build on his work at Digital rather than creating a " DOS plus ".

For the first time, OS / 2 was able to run more than one DOS application at a time.

Because of the limitations of the Intel 80286 processor, OS / 2 1. x could run only one DOS program at a time, and did this in a way that allowed the DOS program to have total control over the computer.

In 1980, after promising to deliver IBM a Disk Operating System ( DOS ) they had not yet developed for the Intel 8088-based IBM PC, Allen spearheaded a deal for Microsoft to purchase a Quick and Dirty Operating System ( QDOS ) written by Tim Paterson who, at the time, was employed at Seattle Computer Products.

The least expensive and most popular was PC DOS made by Microsoft.

DOS and TOS were developed for systems with at least 16K bytes and either disks or tape drives.

Almost all DOS extenders are based on DPMI and allow DOS programs to address all memory available in the PC and to run in protected mode ( mostly in ring 3, least privileged ).

The system would utilize DR DOS ' new " Vladivar " Extended DOS component with flat memory support, which had been under development at least since 1991.

* DOS / 360 for machines with at least 16 KB memory and a disk drive,

This meant at least an additional Random access memory was needed to run with DOS loaded ,.

There exist at least two different covers of the DOS version.

Because of the changes between the DOS and Linux versions of M. U. G. E. N however, many older characters required at least the SFF files to be modified to show palettes correctly ( notably on portraits ) as well as some changes in how certain CNS script controllers functioned, causing some minor upset and those that could still run the DOS version in some form sticking to that, as well as DOS patches to downgrade characters to be compatible with the older version of the engine.

Bart's House of Weirdness does not have a wide fan base because it was only released for DOS, but the early reviews of the game were positive, at least in terms of graphics and sound.

* In at least the Amiga and DOS versions of the game, a flying saucer can rarely be seen during the flight sequence.