• The first digital computer
• The ENIAC (Electronic Numerical Integrator And Calculator) was invented by J. Presper Eckert and John Mauchly at the University of Pennsylvania and began construction in 1943 and was not completed until 1946.
• It occupied about 1,800 square feet and used about 18,000 vacuum tubes, weighing almost 50 tons.
• ENIAC was the first digital computer because it was fully functional.