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ANDOS
Developer	Alexey Nadezhin, Sergey Kamnev (ANCO company)
Written in	Assembly language
OS family	DOS
Working state	Discontinued
Source model	Closed source
Initial release	1992; 32 years ago (1992)
Final release	3.30 / December 1997; 27 years ago (1997-12)
Platforms	Electronika BK (PDP-11 architecture)
Kernel type	Monolithic
Influenced by	MS-DOS
Default user interface	Disk Master or BK Shell graphical non-windowing file managers
License	Proprietary, commercial and freeware versions exist, latest version is free for download from the official site
Official website	www.df.ru/~andos/ at the Wayback Machine (archived 28 August 2009)

ANDOS is a Russian operating system for Electronika BK series computers: BK-0010, BK-0011, and BK-0011M. They were based on the PDP-11 architecture by Digital Equipment Corporation. ANDOS was created in 1990 and released first in 1992. Initially it was developed by Alexey Nadezhin (by whose name the system is named) and later also by Sergey Kamnev, who joined the project. It was the only widespread system on BK series computers that used MS-DOS-compatible file system format. ANDOS used the FAT12 file system on 800 Kb floppy disks. For Electronika BK-0011M and BK-0011, ANDOS could emulate a BK-0010 by loading a BK-0010 read-only memory (ROM) image into BK-0011(M) random-access memory (RAM). In minimal configuration, the system could occupy less than 4 Kb of RAM.

The system was able to support up to 64 disk drives (or hard disk drive partitions), and RAM disks in the computer's memory and tape recording. It could also have read-only access to MicroDOS file system format disks, although in the last version, this function was transferred from system core to the file manager and became optional.

References

"ANDOS Official homepage". Archived from the original on 28 August 2009. Retrieved 15 January 2003.
"Archive of programs for Soviet home and school computers" (in Russian). {{cite magazine}}: Cite magazine requires |magazine= (help)
Nadezhin, A. M. "Disk operation system ANDOS (Article with description of ANDOS v2.30$ by its creator". Personal computer BK-0010 – BK-0011M (in Russian).
Yurov, V. P. (1993). "BK-0010(.01) with disk drive (Comparison of operating systems for BK-0010)". Personal computer BK-0010 – BK-0011M (in Russian).
Usenkov, D. Yu. (1993). "BK-0010: Experience of work with a disk (from user's point of view)". Personal computer BK-0010 – BK-0011M – Comparison between NORD and ANDOS (in Russian).
Yurov, V. P. (1994). "Disk operating systems for BK-0011(M) (djvu)". Personal computer BK-0010 – BK-0011M (in Russian).

v t e Operating systems for Elektronika BK
ANDOS MK-DOS OS BK-11 AO-DOS CSI-DOS BASIS DOSB10 NORD NORTON-BK MicroDOS KMON PascalDOS Turbo-DOS DX-DOS RAMON RT-11 HC-DOS OS/A WASP