>> For shame! WfW was 3.11, >> > > 3.1.1, IIRC > actually, there was a 3.10 and 3.11 release of Windows for Workgroups. The 3.11 release introduced the use of 32 bit protected mode implementation of the network stack and file system via extensive use of VxD drivers, and set the stage for Windows95 where almost the whole OS kernel ran in VxD space (prior versions used 16bit realmode IO components from MSDOS).