| Brand | Optimized Systems Software, Inc. |
|---|---|
| Country of Origin | United States |
Check the listing for details. OS/A+ Version 2 - 1982 Atari 400/800 OSS Systems Disk, Percom Data Co. - Tested. Made in United States. Listed at 25.00 USD. This was tested on an Atari 800 using an Atari 1050 disk drive.
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