Username or EmailPassword
"There is source from Microsoft in there somewhere"
most notably parts of the file system. But I think IBM removed the Microsoft bits a long time ago. OS/2 in its current incarnation (Warp 4.52) is as license free as it gets. But some of the large customers (yes they exist - the German "Postbank" for example) could start to look funny.
Still, I signed the petition and hope for the best.