Over 40 systems were sold. Comprising some 5,000 vacuum tubes and weighing nearly eight tons, the memory in the UNIVAC I was made of mercury-filled acoustic delay lines that held 1,000 12-digit ...

Bell Telephone Laboratories develops the transistor in 1947. UNIVAC, the Universal Automatic Computer (pictured below), is developed in 1951. It can store 12,000 digits in random access mercury ...