Computer History Milestones By douglasj Period: Dec 2, 1940 to Dec 2, 2009 Computing History Milestones Dec 2, 1946 Eniac Created The History of the Eniac ComputerThe first large-scale electronic computer was created. Mar 31, 1951 Univac Computer - The First Commercial Computer Univac Computer- The 1st Commercial Computer Nov 17, 1970 1st Computer Mouse Invented - Douglas Englebart 1st Computer Mouse