N.J.Petterson, Inc is an independent software and systems integration firm founded in 1986 and specializing until recently in real-time data acquisition and process control based on Digital Equipment Corporation (DEC) systems for steelmaking applications, including blast furnace modeling, continuous casting, and hot rolling mill automatic gauge control. The company also delivers customized onsite training in subjects ranging from legacy systems support/migration to open source software (e.g., Linux, Apache, MySQL, and PHP) for process control.