[1] Policy Certification Authority

[2] Parallel Computing Action (ESPRIT-Project)

[3] Personal Communication Assistant (Dataquest Inc.)

[4] Positive Controlled Airspace (above 18,000') {Luftfahrt}

[5] Power Calibration Area

[6] Printed-Circuit Assembly

[7] Pitch Control Assembly (->"NASA Acronym List")

[8] Point of Closest Approach (->"NASA Acronym List")

[9] Portage Creek, AK, USA -internationale Fughafen-Kennung