JOHNNIAC

The JOHNNIAC was an early computer built by the RAND Corporation (not to be confused with Remington Rand, maker of the contemporaneous UNIVAC I computer) that was based on the von Neumann architecture that had been pioneered on the IAS machine. It was named in honor of von Neumann, short for John v. Neumann Numerical Integrator and Automatic Computer. JOHNNIAC is arguably the longest-lived early computer, being used almost continuously from 1953 for over 13 years before finally being shut down on February 11, 1966, logging over 50,000 operational hours.