PTA

PTA may refer to:

Organizations

 * Andalusia Technology Park (Spanish: Parque Tecnológico de Andalucía), a science park in Málaga, Spain
 * Pakistan Telecommunication Authority, an agency in Pakistan responsible for communication networks.
 * Parent–teacher association, an organization of parents, teachers, and staff at a school
 * Passenger transport authority, a United Kingdom local government authority
 * Public Transport Authority (Denmark)
 * Public Transport Authority (Western Australia)

Science and medicine

 * 1,3,5-Triaza-7-phosphaadamantane, organic compound
 * Percutaneous transluminal angioplasty, surgical procedure
 * Peritonsillar abscess
 * Persistent truncus arteriosus, congenital heart disease
 * Pharmacy Technical Assistant
 * Phosphate acetyltransferase, enzyme
 * Physical Therapist Assistant
 * Plasma thromboplastin antecedent, blood enzyme
 * Plasma Transferred Arc, coating technology
 * Post-traumatic amnesia, state of confusion following a traumatic brain injury
 * Pulsar timing array, technique to detect gravitational waves
 * Pure tone audiometry, hearing test
 * Purified terephthalic acid, organic compound used to make polyester

Other uses

 * Paul Thomas Anderson, American filmmaker
 * Planes, Trains and Automobiles, a 1987 American film by John Hughes
 * Pohakuloa Training Area, a military training facility
 * Point of total assumption, a contract term
 * Preferential trading area, a type of trading bloc
 * Pretoria, the administrative and de facto capital of South Africa
 * Prevention of Terrorism Act, the name of several countries' Acts of Parliament
 * Program test authority, after a construction permit but before a broadcast license
 * Port Talbot Parkway railway station in Wales (station code)
 * a possible mnemonic symbol for Peseta, the former Spanish currency