!!! Atari DOS 2 or DOS II Version 2.x

There were many variations with DOS 2. Here are just the most used ones.

!!ATR-Images
* [Atari DOS II Vers. 2.0S.atr] ; original single density Atari DOS II
* [Atari DOS II Vers. 2.0S enhanced|DOS 2.0S enhanced.atr] ; Atari DOS II colored and with new functions
* [Atari DOS II Vers. 2.0D.atr] ; original double density Atari DOS II for the Atari 815 dual disk drive
* [Atari_DOS_II_D2.0S-offizielles_deutsches_Atari_DOS.atr] ; original Atari DOS II version D2.0S (german)
* [Atari DOS II Vers. 2.5.atr] ; original Atari DOS II version 2.5
* [Atari DOS II Vers. 2.5 deutsch.atr] ; original Atari DOS II version 2.5 (german)
* [Atari DOS II Vers. 2.75 SD|DOS_2.75_SD.atr] ; Atari DOS II version 2.75 on a SD diskette
* [Atari DOS II Vers. 2.75 MD|DOS_2.75_MD.atr] ; Atari DOS II version 2.75 on a MD diskette
* [90KB.atr] ; blank formatted disk with single density and single sided: 90 KB
* [130KB.atr] ; blank formatted disk with enhanced density and single sided: 130 KB
* [180KB.atr] ; blank formatted disk with double density and single sided: 180 KB
* [360KB.atr] ; blank formatted disk with double density and double sided: 360 KB (Atari XF 551 only)
* [SSDD128 DOS XE.atr] ; blank formatted disk with double density and single sided: 180 KB, with 128 byte header for Atari DOS XE
* [SSDD256 DOS XE.atr] ; blank formatted disk with double density and single sided: 180 KB, with 256 byte header for Atari DOS XE
* [720K MyDOS-2.atr] ; blank formatted disk for MyDOS: 720 KB
* [720K SpartaDOS.atr] ; blank formatted disk SpartaDOS: 720 KB

!!Manuals
* [The Atari 810 Disk Drive-An Introduction To The Disk Operating System.pdf] Version 2.0S (english)
* [Atari DISK OPERATING SYSTEM 2.5 Manual.txt] Version 2.5 Atari DOS II manual, text only (english)
* [Atari DOS 2.5-XF551.pdf] Version 2.5 (english)
* [Das Atari 810 Plattenlaufwerk.pdf] Version 2.0S (german)
* [Atari Diskettenlaufwerk-DOS 2.5-XF551.pdf] Version 2.5 (german)
* [XF551 Formate.pdf] Version 2.5 (german) from Erwin Reuss

!!Reference
* [Wikipedia: Atari DOS|http://en.wikipedia.org/wiki/Atari_DOS]

!!Image
[{Image src='atari-400-800-dos.jpg' width=640 height=825 }]
Disk Operating System II (DOS II) - Reference Manual - Cover