UNIVAC Series 90
| Company type | Product line |
|---|---|
| Industry | Computer hardware |
| Predecessor | UNIVAC 9000 series |
| Founded | 1973 |
| Founder | UNIVAC (Sperry) |
| Fate | Discontinued in early 1980s |
Area served | Worldwide |
| Products | Mainframe computers (models 90/25, 90/30, 90/40, 90/60, 90/70, 90/80) |
| Parent | Sperry Corporation |
The Univac Series 90 represents a now-obsolete line of mainframe computers developed by UNIVAC, first launched in 1973. The entry-level variants consisted of the 90/25, 90/30, and 90/40 models, all operating on the OS/3 system. Mid-tier offerings included the 90/60 and 90/70 units, whereas the top-tier 90/80, unveiled in 1976, operated using the virtual-memory OS VS/9.
This Series 90 lineup succeeded the UNIVAC 9000 series, which were earlier low-end mainframes produced by Sperry Univac during the 1960s.
History
In January 1972, Sperry acquired the customer base of RCA, subsequently marketing RCA's Spectra 70 and Series machines under the name UNIVAC Series 70. They enhanced the processor from the 9000 series’ 9700 model by integrating virtual memory capabilities and rebranded it as the 90/70. Concurrently, development efforts shifted away from the real-memory OS/7 system toward adopting VS/9, which was derived from RCA’s VMOS. The introduction of the 90/70 and its more affordable counterpart, the 90/60, took place in 1973, offering RCA users of systems like the 70/45 and RCA models 2 and 3 a clear upgrade path. In 1976, Sperry expanded the lineup with the high-performance 90/80—based on an RCA design—targeting customers operating systems such as the 70/60 and RCA model 6.
Additional lower-tier models followed: the 90/30 appeared in 1974, succeeded by the 90/25 in 1977, and then the 90/40 in 1978.
Capitalizing on RCA’s lucrative customer base enabled Sperry to maintain a remarkable run of forty consecutive profitable quarters. Alongside the Series 90 family, Sperry also marketed its 1100 series, where the entry-level 1100/60 was designed to accommodate users transitioning upward from Series 90 machines.
In 1980, Sperry launched the System 80 as a successor for the lower-end Series 90 models (namely the 90/25, 90/30, and 90/40). This new system offered enhanced processing speeds, lower energy consumption, and a more compact design, initially available in models numbered 3 and 5.
By the early 1980s (1982-83), development on Series 90 ceased as Sperry discontinued VS/9 support to concentrate resources on their more competitive 1100 series. This strategic pivot was driven by increasing market pressures from IBM’s IBM 4300 series—which delivered superior price-to-performance ratios—and growing rivalry from Digital Equipment Corporation’s VAX midrange systems. Following these challenges, Sperry experienced revenue declines and workforce reductions as DEC overtook it to become IBM’s closest competitor in size within the U.S. computer industry.