"I think there is a world market for maybe five computers."
Thomas Watson, chairman of IBM ; 1943
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| Number | Title | Issue Date |
| 4704607 | System for remotely adjusting a parameter of an electrical circuit within an enclosure Gas sensors 1 are mounted on respective explosion proof housings 2 that contain microprocessor circuitry 11 for operating signals from the sensors. Signals from the circuitry 11 are transmitted along a digital highway 4 to a central control unit. The sens... | 11/03/1987 |