PCA
[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