OS/2 1.1 build 4.72

OS/2 1.1 build 4.72 is the build of OS/2 1.1 that was included with version 1.03 of the Microsoft OS/2 SDK. It is the earliest known build to include the Presentation Manager interface. OS/2 Museum posted several screenshots of this build in 2011. It remains unreleased as of 2021.