 It was called the UNIVAC LARC (Livermore Advanced Research Computer) that was built by Remington Rand Philadelphia Univac-division of Sperry Rand Corporation and was delivered to the Atomic Energy Commission-University of California's Lawrence Radiation Laboratory in May 1960.A second Univac LARC transistorized supercomputer, using Philco's surface-barrier transistor technology, was contracted and delivered in October 1960 to the United States Navy-David Taylor Basin Research Unit.The surface-barrier transistor became obsolete in the early 1960s with the development of the planar diffusion transistor.