What does PTA stand for?

African Preferential Trade Area (SAUS)

Angolan Labor Party - Political party (PSAP)

Eastern and Southern African Preferential Trade-Area (SAUS)

National Postal Transport Association - Later, APWU

Packed Tower Aeration (MEC)

Page Table Address - Computer science (IAA)

Pain, Tears, and Agony - Medicine (EDAA)

Pai Tavytera - Language code (ETLW)

Palatines to America (EA)

Pantera - NCIC car model code

Pantorama Industries, Inc. - Toronto Stock Exchange symbol

Paper and Twine Association (EA)

Paper Tape Accessory (MHDI)

Paper Towel Association - British (BI)

Parallel Tubular Array - Cytology

Parathyroid Adenoma - Medicine (STED)

Parent-Teacher Association

Part Throttle Acceleration - Engines (EG)

Part Time Alcoholic (SAUS)

Passenger Transport Authorities - British

Passenger Transport Authority (SAUS)

Passive Towed Array (SAUS)

Patient-Triggered Analgesia (SAUS)

Penn Treaty American - NYSE symbol (SPSG)

Penn Treaty American Corp. - NYSE symbol

People Taking Action

Percent Time Active (CAAL)

Percutaneous Transluminal Angiography (SAUS)

Percutaneous Transluminal Angioplasty - Medicine

Performance Technology Associates, Inc. - Commercial firm

Periodical Title Abbreviations - A publication

Peritonsillar Abscess - Medicine

Persistent Truncus Arteriosus - Medicine (RAWO)

Peseta - Monetary unit - Spain and Latin America

Pet Traders Association (SAUS)

Phenyltrimethylammonium - Also, PTM, PTMA - Organic chemistry

Philippine Tobacco Administration (SAUS)

Philippine Travel Authority (SAUS)

Phorbol Tetradecanoyl Acetate - Also, PMA, TPA - Organic chemistry

Phosphoryl Triamide - Organic chemistry

Phosphotransacetylase - An enzyme

Phosphotungstic Acid - Inorganic chemistry

Photographers' Telegraph Association

Photo Transistor Amplifier (SAUS)

Phototransistor Amplifier

Physical Therapy Assistant

Pianoforte Tuners' Association - British (DBA)

Piano Tuners Association (SAUS)

Picatinny Arsenal - New Jersey - Later, Armament Development Center - Army

Pilotless Target Aircraft - Military

Pitch Trim Adjustment

Pitch Trim Angle

Planar Turbulence Amplifier (IEEE)

Plan-Test Associates - Commercial firm

Plasma Thrombin Antecedent (SAUS)

Plasma Thromboplastin Antecedent - Factor XI - Hematology

Plasma Transferred Arc - Metallurgy

Platelet Thromboplastin Antecendent - Medicine (STED)

Platinized Titanium Anode

Point of Total Assumption (MCD)

Polish Telegraphic Agency (SAUS)

Pope and Talbot (SAUS)

Port Alsworth - Alaska - Airport symbol (OAG)

Postal Transportation Association (SAUS)

Postcard Traders' Association - British (DBA)

Posterior Tibial - Pulse - Medicine (DAVI)

Post-Tensioning Association (SAUS)

Post-Test Analysis - NASA (NASA)

Post-Timeline Assessment (SEWL)

Post-Traumatic Amnesia - Medicine

Potential Toxic Area (NASA)

Power Tech Associates, Inc. - Commercial firm

Power Transfer Assembly (IAA)

Preferential Trade Agreement (TRDE)

Preferential Trade Arrangements - ASEAN (IMH)

Premium Transportation Authorization (AAG)

Prepaid Ticket Advice - Travel industry (TRID)

Preparation through Acceptance

Pressure Transducer Assembly

Pre-Treatment Anxiety - Medicine (DMAA)

Prevention of Terrorism Act - British

Price-Tag Awareness - See also PTS

Primary Target Area - Military

Primary Tungsten Association - British (EAIO)

Principle Technical Advisor (SAUS)

Printing Trades Alliance - British (DBA)

Prior to Administration (AMHC)

Prior to Admission - Medicine

Prior to Arrival - Medicine (BCRP)

Procrustes Target Analysis - Marine science

Procurement Technical Assistance

Profan Test Assessment - NASA

Profiler Triangle Analysis package (SAUS)

Programmable Translation Array

Programmed Time of Arrival (ACAE)

Programmed Translation Array (SAUS)

Program Time Analyzer

Propfan Technology Assessment (SAUS)

Propfan Test Assessment (ACAE)

Proposed Technical Approach

Propulsion Test Article - NASA (NASA)

Protestant Teachers Association (NADA)

Prothrombin Activity - Hematology

Protionamid (SAUS)

Proton Target Area

Ptarmigan Airways Ltd. - Canada - ICAO designator (FAAC)

Pulse Torquing Assembly (KSC)

Punta Arenas - Chile - Seismograph station code, US Geological Survey - Closed (SEIS)

Purchase Transaction Analysis

Pure Terephthalic Acid (DICI)

Pure Tone Acuity (STED)

Pure Tone Audiometry (MELL)

Pure Tone Average - Otorhinolaryngology (DAVI)

Purified Terephthalic Acid - Organic chemistry