OS/2 Warp 4 incorporated a number of new technologies over OS/2 Warp 3, such as Java, OpenGL, OpenDoc, and VoiceType. It also updated the appearance of the Workplace Shell.
Other OS/2 Versions:
| 1.x | 2.x | 3.x | 4.x | All |
4.52 was the last release from IBM. Later versions of this OS are available from Serenity Systems under the name eComstation.
These are full install media that basically include all Warp 4 fixes at the time of release. IBM referred to these CDs as "OS/2 Convenience Pack"
Note on build numbers:
There are some additional language versions here: https://archive.org/download/OS2Warp4.52 but they seem to suffer from file corruption.