使用者:Yining Chen/沙盒/Page0
維基百科,自由的 encyclopedia
The IBM 7090 is a second-generation 電晶體計算機 version of the earlier IBM 709(英語:IBM 709) vacuum tube 大型計算機 that was designed for "large-scale scientific and technological applications". The 7090 is the fourth member of the IBM 700/7000 series(英語:IBM 700/7000 series) scientific computers. The first 7090 installation was in December 1959.[1] In 1960, a typical system sold for $2.9 million (equivalent to $20 million in 2023) or could be rented for $63,500 a month (相當於2020年的$434,000).
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/1/15/IBM_7090_console.nasa.jpg/280px-IBM_7090_console.nasa.jpg)
The 7090 uses a 36-bit(英語:36-bit) 字 (計算機), with an address space of 32,768 words (15-bit addresses). It operates with a basic memory cycle of 2.18 μs, using the IBM 7302(英語:IBM 7302) Core Storage 磁芯記憶體 technology from the IBM 7030(英語:IBM 7030) (Stretch) project.
With a processing speed of around 100 每秒浮點運算次數,[2] the 7090 is six times faster than the 709, and could be rented for half the price.[3] An upgraded version, the 7094 was up to twice as fast. It was withdrawn from sale on July 14, 1969, but systems remained in service for more than a decade after.[4]