Editing Apple ProDOS (section)

{{Short description|Apple II disk operating system}}
{{refimprove|date=November 2009}}
{{Infobox OS
| name                   = ProDOS 8
| logo                   =
| screenshot             = PRODOS402 catalog.png
| caption                = A floppy disk catalog in ProDOS 8 v2.0.3
| developer              = [[Apple Inc.|Apple Computer]]
| source_model           = [[Proprietary software|Closed source]] (but version 1.7)<ref>{{cite web|url=https://mirrors.apple2.org.za/ftp.apple.asimov.net/documentation/source_code/apple2_SRC_ProDOS17_1988.pdf|title=Apple ][ ProDOS 1.7 Operating System Source Listing|website=Apple|access-date=25 February 2024}}</ref>  
| kernel_type            = [[Monolithic kernel]]
| supported_platforms    = [[Apple II]]
| ui                     = primarily [[text user interface]]
| family                 = [[Apple SOS|SOS]]
| released               = {{Start date and age|1983|10}}
| discontinued           = yes
| latest_release_version = 2.0.3
| latest_release_date    = {{Start date and age|1993|05|06}}
| marketing_target       =
| programmed_in          = [[Assembly language]]
| prog_language          =
| language               = [[English language|English]]
| updatemodel            =
| package_manager        =
| working_state          = Discontinued
| license                = Apple Software License Agreement
| website                =
}}
{{Infobox OS
| name                   = ProDOS 16
| logo                   =
| screenshot             = ProDOS16.png
| caption                = ProDOS 16 v1.6 - running an earlier version of the Apple IIGS Finder
| developer              = [[Apple Inc.|Apple Computer]]
| source_model           = [[Closed source]]
| kernel_type            = [[Monolithic kernel]]
| supported_platforms    = [[Apple IIGS|Apple II{{sc|gs}}]]
| ui                     =
| family                 = [[Apple SOS|SOS]]
| released               = {{Start date and age|1986|09}}
| latest_release_version = 1.6
| latest_release_date    = {{Start date and age|1988|06|14}}
| marketing_target       =
| programmed_in          =
| prog_language          =
| language               = [[English language|English]]
| updatemodel            =
| package_manager        =
| working_state          = Discontinued
| license                = Apple Software License Agreement
| website                =
}}

'''ProDOS''' is the name of two similar [[operating system]]s 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|date=January 2009}}  The other, '''ProDOS 16''', was a stop-gap solution for the [[16-bit]] [[Apple IIGS|Apple II{{sc|gs}}]] that was replaced by [[Apple GS/OS|GS/OS]] within two years.<ref name="ah15">{{cite web | url = http://apple2history.org/history/ah15.html#SOS | work = Apple II History | title = Chapter 15: DOS 3.3, ProDOS & Beyond | date = 2001-07-07 | first = Steven | last = Weyhrich | access-date = 2003-06-27 | archive-url = https://web.archive.org/web/20080917065143/http://apple2history.org/history/ah15.html#SOS | archive-date = 2008-09-17 | url-status = dead }}</ref>

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.<ref>{{cite web|url= http://www.vectronicsappleworld.com/appleii/dos.html|title= History of DOS 3.3 and ProDOS|access-date= 2013-08-28|archive-url= https://web.archive.org/web/20130606063515/http://www.vectronicsappleworld.com/appleii/dos.html|archive-date= 2013-06-06|url-status= dead}}</ref>