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Atari DOS

This article is about the operating system of the Atari 8-bit computers. For the Atari ST's operating system, see Atari TOS.
For the MS-DOS compatible operating system of the Atari Portfolio, see DIP DOS.
"MyDOS" redirects here. For the similarly pronounced Microsoft operating system, see MIDAS.
"RealDOS" redirects here. For the similarly named successor to Multiuser DOS, see IMS REAL/32.
"Turbo-DOS" redirects here. For the CP/M-compatible operating system, see Software 2000 TurboDOS.
Atari DOS
Atari DOS version 2.5, main menu
DeveloperAtari, Inc., Atari Corporation
Working stateDiscontinued
Source modelClosed source
Initial release1979 (1979)
Latest releaseXE 1.0 / 1987 (1987)
Available inEnglish
PlatformsAtari 8-bit computers
Default
user interface		Menu
LicenseProprietary EULA

Atari DOS is the disk operating system used with the Atari 8-bit computers. Operating system extensions loaded into memory were required in order for an Atari computer to manage files stored on a disk drive. These extensions to the operating system added the disk handler and other file management features.

The most important extension is the disk handler. In Atari DOS 2.0, this was the File Management System (FMS), an implementation of a file system loaded from a floppy disk. This meant at least an additional 32 KB RAM was needed to run with DOS loaded.

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