IBM’s programming documentation (Programming Tools and Information, aka PTI) for OS/2 versions 1.2 and 1.3 has been added. Big thanks to Bob Eager who scanned the originals and converted them to PDF.
The documents have been added to the OS/2 1.x programming library. The newer REXX documentation is technically part of the OS documentation set, but thematically belongs with programming information.
Thanks to everyone helping preserve this info.
P.S. I think your link to the “Dialog Manager Guide and Reference” is broken.
Link fixed, thanks!