The IBM 1710 was a process control system that IBM introduced in March 1961. It used either a 1620 I or a 1620 II Computer and specialized I/O devices (e.g., IBM 1711 A/D and D/A Converter, IBM 1712 Discrete I/O and Analog Multiplexer, 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.
References
IBM 1710 Wikipedia(Text) CC BY-SA