Windows 1.0/Development Release 4

From BetaArchive Wiki
Development Release #4
Kernel version 1.0
CPU architecture x86 (16-bit)
Compilation date 31st August 1984

Development Release #4 is a pre-release build of Microsoft Windows 1.0. It was compiled in late August 1984. Images of the disks and the release notes were shared by member Allosgroup on the 8th of July 2021.[1]

It is the last build to use the .MOD extension as the main executable format.