from website: www.gregdonner.org/workbench/os_versions.html

AmigaOS Versions

This table lists all known AmigaOS versions, both beta and release. If
any data is incorrect, or you have information to add, please e-mail me.

Beta Release Workbench version(s) Kickstart version(s)
0.7   27.5 27.3
0.8?   28/2 (authentic format), 28.7  
0.9     29.2
  1.0 30 (NTSC only)
  1.1 31.334 31.34 (NTSC), 32.34 (PAL)
  1.2 33.43, 33.46, 33.47, 33.56, 33.59, 33.61 33.166, 33.180
1.2.1     34.4
  1.3 34.1 34.5
1.3.1   34.25 unchanged
  1.3.2 34.28 unchanged
  1.3.3 34.34 unchanged
  1.3.4 (A2024) 34.20 (built-on) unchanged
1.4   36.1123, 36.1228, 36.16, 36.8, 36.993 36
  2.00 36.69 36.141
  2.01 36.69 36.143
  2.02 36.70 36.207
  2.03 36.102 36.209
  2.04 37.67 37.175
  2.05 37.71, 37.72, 37.74 37.299, 37.300, 37.350
2.1   38.12, 38.18, 38.23, 38.28, 38.31, 38.32  
  2.1 38.35, 38.36 unchanged
3.0     39.110
  3.0 39.29 39.106
3.1   39.82, 39.92  
  3.1 40.42 40.55, 40.56, 40.58, 40.60, 40.63, 40.68, 40.70
3.2   40.42 43.1B
3.5      
  3.5 44.2 (orig. CD), 44.4 (BB1), 44.5 (BB2)  
3.9      
  3.9 45.1 (orig. CD), 45.2 (BB1), 45.3 (BB2) 45.057
4.x   50.2 (U-Boot 1.0.0)  
  4.0 52.1 (U-Boot 1.1.1) 52.8
  4.1 52.2 53.2