 | This article needs additional citations for verification. (November 2009) |
 A floppy disk catalog in ProDOS 8 v2.0.3 | |
| Developer | Apple Computer |
|---|---|
| Written in | Assembly language |
| OS family | SOS |
| Working state | Discontinued |
| Source model | Closed source (but version 1.7)[1] |
| Initial release | October 1983 |
| Final release | 2.0.3 / May 6, 1993 |
| Available in | English |
| Platforms | Apple II |
| Kernel type | Monolithic kernel |
| Default user interface | primarily text user interface |
| License | Apple Software License Agreement |
 ProDOS 16 v1.6 - running an earlier version of the Apple IIGS Finder | |
| Developer | Apple Computer |
|---|---|
| OS family | SOS |
| Working state | Discontinued |
| Source model | Closed source |
| Initial release | September 1986 |
| Latest release | 1.6 / June 14, 1988 |
| Available in | English |
| Platforms | Apple IIGS |
| Kernel type | Monolithic kernel |
| License | Apple Software License Agreement |
ProDOS is the name of two similar operating systems for the Apple II of personal computer. The original ProDOS, renamed ProDOS 8 in version 1.2, is the last official operating system usable by all 8-bit Apple II computers, and was distributed from 1983 to 1993.[citation needed] The other, ProDOS 16, was a stop-gap solution for the 16-bit Apple IIGS that was replaced by GS/OS within two years.[2]
ProDOS was marketed by Apple as meaning Professional Disk Operating System, and became the most popular operating system for the Apple II 10 months after its release in January 1983.[3]
- ^ "Apple ][ ProDOS 1.7 Operating System Source Listing" (PDF). Apple. Retrieved 25 February 2024.
- ^ Weyhrich, Steven (2001-07-07). "Chapter 15: DOS 3.3, ProDOS & Beyond". Apple II History. Archived from the original on 2008-09-17. Retrieved 2003-06-27.
- ^ "History of DOS 3.3 and ProDOS". Archived from the original on 2013-06-06. Retrieved 2013-08-28.