Abbreviations beginning with a

APSSMAsia Pacific Society for Sexual Medicine
Academic & Science

APSSPAdvanced Protein Secondary Structure Prediction Server (bioinformatics)
Academic & Science

APSSPAdvanced Propulsion Systems and Space Power
Community

APSSPAssociation of Professional Student Services Personnel (Ontario, Canada)
Miscellaneous

APSTMapertured photon scanning tunneling microscopy
Miscellaneous » Unclassified

APSTMapertured photon scanning tunnelling microscopy
Miscellaneous » Unclassified

APSTNDPApplication, Presentation, Session, Transport, Network, Data-link, Physical (network layers)
Computing » Networking

APSTNDPAll People Seem To Need Data Processing
Miscellaneous » Unclassified

APSUAlarm Power Supply Unit
Community

APSUAugusCo Past Students Union
Community » Unions

APSUAdult Protective Services Unit (Australia)
Governmental

APSUAuxiliary Police Support Unit
Governmental » Police

APSUAustralian Paediatric Surveillance Unit
Medical » Hospitals

APSUAdult Protective Services Unit
Miscellaneous » Unclassified

APSUArunachal Pradesh Students Union (India)
Miscellaneous

APSUAsian Pacific Student Union
Miscellaneous

APSUAugusCo Past Students Union (Cape Coast, Ghana)
Miscellaneous

APSUAustin Peay State University (Clarksville, TN)
Miscellaneous

APSUAltorfer Power Systems
Regional » Railroads