UNIVAC 9000 series

The 9000 series uses monolithic integrated circuits for logic and plated-wire memory; The printer differs from earlier UNIVAC printers, being similar to IBM's "bar printer" of the same era. It uses an oscillating-type bar instead of the drums that had been used until this point, and runs at speeds up to 300 lines per minute. As Sperry moved into the 1970s, they expanded the 9000 family with the introduction of the 9700 system in 1971. The 9700 was said to be three to five as powerful as the 9400, twice as powerful as the IBM System/360 Model 50, and less costly than the IBM System/370 Model 145. A lower-cost replacement for the 9400, the 9480, was announced in 1973; it used MOS semiconductor memory rather than plated-wire memory. ==Software==

The 9200 and 9300 run the Minimum Operating System, previously known as NCOS - Non Concurrent Operating System. This system was loaded from cards, but thereafter also supported magnetic tape or magnetic disk for programs and data. The 9400 and 9480 run a real-memory operating system called OS/4. A new operating system for the 9700, called OS/7 was under development, but was discontinued in 1975. == References ==