What does PIA stand for?

MLA style: "PIA." Acronym Finder . 2012. AcronymFinder.com 10 Feb. 2012 http://www.acronymfinder.com/Pain-In-the-Ass-(PIA).html
Chicago style: Acronym Finder . S.v. "PIA." Retrieved February 10 2012 from http://www.acronymfinder.com/Pain-In-the-Ass-(PIA).html
APA style: PIA. (n.d.) Acronym Finder. (2012). Retrieved February 10 2012 from http://www.acronymfinder.com/Pain-In-the-Ass-(PIA).html

Pain In the Ass

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PI3 Kinase Protease Inhibitor 3 (gene) Phosphatidylinositol-3-Kinase Phosphoinositide 3-Kinase Phosphatidylinositol-3-Kinase and Protein Kinase B Protease inhibitor 5 Prevention Indicator 7 Proteinase Inhibitor 9 (enzyme) Packet Immediate Assignment Paid In Advance		Pakistan International Airlines (ICAO code) Parachute Industry Association Parent Interviews for Autism Parlamento Indígena de América (Spanish: Indigenous Parliament of America; Bolivia) Part in Assembly Partial I/O (Input/Output) Activation (computer science) Participatory Impact Assessment Particulate Impact Analyzer Partners in Africa (Saint Paul, MN) Partnership in Action