ACP
[1] Algebra of Communicating Processes[2] Ancillary Control Programm/Process
[3] Advanced Computational Processor
[4] Aerospace Computer Program \{Weltraumfahrt\}
[5] Airline Control Program \{Luftfahrt\}
[6] Aerosol Collector and Pyrolyscience investigation (Huygens Sonde, NASA, http://www.jpl.nasa.gov/cassini/ )