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IBM 1720 - Wikipedia, the free encyclopedia (136 words) |
 | The IBM 1720 was a pilot project to create a real-time process control computer based on the IBM 1620 Model I. |
| Only three 1720 systems were ever built: one for the Amoco oil refinery in Whiting, Indiana; one for the Socal oil refinery in El Segundo, California; and one for E. |
| The 1720 led to the IBM 1710 Process Control systems that IBM marketed in the 1960s; these were cheaper and less elaborate than the 1720. |
| IBM 1620 - Wikipedia, the free encyclopedia (1957 words) |
| Modified versions of the 1620 were used as the CPU of the IBM 1710 and IBM 1720 Industrial Process Control Systems (making it the first computer considered reliable enough for real-time process control of factory equipment). |
| Although the IBM 1620's architecture was very popular in the scientific and engineering community, computer scientist Edsger Dijkstra pointed out several flaws in its design in EWD37, "A review of the IBM 1620 data processing system" (see http://www.cs.utexas.edu/users/EWD/index00xx.html at the Dijkstra archive at the University of Texas). |
| IBM could only build one of the two and the Poughkeepsie proposal won because "the San Jose version is top of the line and not expandable, while your proposal has all kinds of expansion capability - never offer a machine that cannot be expanded". |
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