The UNIVAC 1107 was the first solid-state member of Sperry Univac's UNIVAC 1100 series of computers, introduced in October 1962. It was also known as the "Thin-Film Computer" because of its use of thin-film memory for its register storage. It represented a marked change of architecture: unlike previous models, it was not a strict two-address machine: it was a single-address machine with up to 65,536 words of 36-bit core memory. The machine's registers were stored in 128 words of thin-film memory, a faster form of magnetic storage. With six cycles of thin-film memory per 4 microsecond main memory cycle, address indexing was performed without a cycle time penalty. Only 36 systems were sold.