The IBM 1710 reference article from the English Wikipedia on 24-Jul-2004
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IBM 1710

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The IBM 1710 was a Process Control system that IBM marketed in the 1960s. It used either a 1620 I or a 1620 II Computer and specialized I/O devices (e.g., IBM 1711 A/D Converter, D/A Converter, IBM 1712 Discrete I/O, factory floor operator control panels).

The IBM 1620 used in the 1710 system was modified in several ways, the most obvious was the addition of a very primitive hardware interrupt mechanism.

The 1710 was used by many paper mills and oil refineries.