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AmigaOS Versions

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The version number reflects a revision of the system software. The chart below lists the specific AmigaOS release versions that system libraries versions correspond to:

Version Release Description
27.3 Kickstart 0.7 First AmigaOS version shown at Consumer Electronics Show in 1985. This version is obsolete.
29 Kickstart 0.9 This is an internal AmigaOS version. This version is obsolete.
30 Kickstart 1.0 This revision is obsolete.
31 Kickstart 1.1 This was an NTSC only release and is obsolete.
32 Kickstart 1.1 This was a PAL only release and is obsolete.
33 Kickstart 1.2 This is the oldest revision of the OS.
34 Kickstart 1.3 This is almost the same as release 1.2 except it has an Autobooting expansion.library
35 This is a special RAM-loaded version of the 1.3 revision, except that it knows about the A2024 display modes. No application should need this library unless they need to open an A2024 display mode under 1.3.
36 Kickstart 2.0 This is the original Release 2 revision that was initially shipped on early Amiga 3000 models.
37 Kickstart 2.04 This is the general Release 2 revision for all Amiga models.
38 Kickstart 2.1 This is an updated Release 2 revision for Amiga 600 models.
39 Kickstart 3.0 This is the original Release 3 revision hat was initially shipped on Amiga 1200 and Amiga 4000 models.
40 Kickstart 3.1 This is the original Release 3 revision for all Amiga models.
41 Kickstart 3.1 This is version number which was reserved for the Japanese locale version of AmigaOS 3.1, with multi-byte character support (never completed).
42 This is version number for some AmigaOS' modules of an internal alpha revision (early 1993).
43 Kickstart 3.2 This is the original Release 3 revision for Amiga Walker model (never completed). This revision was used for stuff done by/for Amiga Technologies/Amiga International (1995).
44 Kickstart 3.5 This is an update to Release 3 revision for all Amiga models.
45 Kickstart 3.9 This is an update to Release 3 revision for all Amiga models.
50 Kickstart 4.0 This is the general Release 4 revision for the new AmigaOne range (Developer PreRelease).
51 Kickstart 4.0 This is an update to Release 4 revision for the new AmigaOne range (Official Release from Update 1).
52 Kickstart 4.0 This is an update to Release 4 revision to include support for PPC equipped classic Amiga models.
53 Kickstart 4.1 This is an update to Release 4 revision for all supported PPC models.