Term:Process Controller
NIST SP 800-82 Final Draft
Process Controller - A proprietary computer system, typically rack-mounted, that processes sensor input, executes control algorithms, and computes actuator outputs. [Falco, Joe, et al., IT Security for Industrial Control Systems, NIST IR 6859, 2003, http://www.isd.mel.nist.gov/documents/falco/ITSecurityProcess.pdf.]