1949 – The first jet-powered airliner, the de Havilland Comet, made its first flight. Previously jet engines had only been used to power small fighter aircraft.
http://www.history.com/this-day-in-history/first-jet-makes-test-flight
1981 – Microsoft bought the rights for QDOS (Quick and Dirty Operating System) from Seattle Computer Products for $25,000.
http://www.extremetech.com/computing/91202-ms-dos-is-30-years-old-today
1993 – Microsoft released Windows NT 3.1, completing its attempt to build an advanced 32-bit operating system from scratch.
http://windows.microsoft.com/en-us/windows/history?SignedIn=1
Read Tom’s science fiction and other fiction books at Merritt’s Books site.