Apple ProDOS

ProDOS 8
A floppy disk catalog in ProDOS 8 v2.0.3
DeveloperApple Computer
Written inAssembly language
OS familySOS
Working stateDiscontinued
Source modelClosed source (but version 1.7)[1]
Initial releaseOctober 1983; 41 years ago (1983-10)
Final release2.0.3 / May 6, 1993; 31 years ago (1993-05-06)
Available inEnglish
PlatformsApple II
Kernel typeMonolithic kernel
Default
user interface
primarily text user interface
LicenseApple Software License Agreement
ProDOS 16
ProDOS 16 v1.6 - running an earlier version of the Apple IIGS Finder
DeveloperApple Computer
OS familySOS
Working stateDiscontinued
Source modelClosed source
Initial releaseSeptember 1986; 38 years ago (1986-09)
Latest release1.6 / June 14, 1988; 36 years ago (1988-06-14)
Available inEnglish
PlatformsApple IIGS
Kernel typeMonolithic kernel
LicenseApple 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]

  1. ^ "Apple ][ ProDOS 1.7 Operating System Source Listing" (PDF). Apple. Retrieved 25 February 2024.
  2. ^ 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.
  3. ^ "History of DOS 3.3 and ProDOS". Archived from the original on 2013-06-06. Retrieved 2013-08-28.