It's incredible to me that Microsoft was dog fooding NT with the NT dev team in early-1991. First stage was when it was just a CLI without networking. Then graphics but no networking. Then all three. Looking forward it made sense since shipping to production was supposed to be mid-1992 but knowing it didn't get out the door until Q3 1993 it's impressive how raw a state it was in when they were in the "build the aircraft as we fly it" mode. #windows #history #ComputerHistory #RetroComputing