PTC

• Pacific Theological College, in Suva, Fiji
• Parent-teacher conference
• Pilot Training College, a former organisation in Ireland and the US
• Pittsburgh Technical College, a 2-year college in Pittsburgh, PA, US
• Police Training Centre, Bangladesh
• Portage Trail Conference, an association of public schools in Ohio, US
• Presbyterian Theological College, Victoria, Australia
• RAF Personnel and Training Command, 1994–2007

• Papillary thyroid cancer, the most common type of thyroid cancer
• Percutaneous transhepatic cholangiography, an X-ray technique for the biliary tract
• Pseudotumor cerebri or idiopathic intracranial hypertension, a brain disorder

• Pacific Telecommunications Council, a telecommunications industry trade association for the Pacific Rim
• Pakistan Telecommunication Company Ltd, KSE code
• Pakistan Tobacco Company
• Partido Trabalhista Cristão (Christian Labour Party), a political party in Brazil
• Partit del Treball de Catalunya (Party of Labour of Catalonia), a communist party in Catalonia, Spain
• Polska Telefonia Cyfrowa, formal name of T-Mobile Polska
• PTC India, an Indian energy trading company
• PTC Punjabi, a television network in India
• PTC Punjabi (Canada)
• PTC Punjabi Film Awards
• Public Services, Tax and Commerce Union, UK, 1996–1998
• Public Transport Commission, in New South Wales, Australia
• Public Transport Corporation, in Victoria, Australia
• Public Transport Council, in Singapore
• Radio Television of Serbia (Радио-телевизија Србије), a public broadcaster in Serbia

• Parents Television Council, a U.S.-based advocacy group
• Pennsylvania Turnpike Commission
• Philadelphia Toboggan Coasters, roller coaster manufacturer, formerly Philadelphia Toboggan Company
• Philadelphia Transportation Company, 1940–1968
• Pioneer Theatre Company, Utah
• a type of patrol boat, for example Patrol torpedo boat PT-41
• PTC Inc., formerly Parametric Technology Corporation, a software company
• PTC Therapeutics, a pharmaceutical company

• Pakuwon Trade Center, a shopping center in Indonesia
• Pitcairn Islands (by ITU country code)
• Punggol MRT/LRT station, Singapore (by LRT code)

• Passive thermal control, a slow roll of a spacecraft on its horizontal axis to stabilize the thermal response to solar heating
• Patched, a protein receptor
• Peptidyl transferase centre, associated with protoribosomes and the possible origin of ribosomes and abiogenesis
• Phase-transfer catalyst, that facilitates interphase migration
• Phenylthiocarbamide, an organosulfur thiourea
• Poly(trimethylene carbonate), a derivative of trimethylene carbonate
• Positive temperature coefficient, of materials which increase resistance with temperature
• Polymeric positive temperature coefficient (PPTC) device or resettable fuse
• PTC heating element, a type of self-regulating heater
• PTC thermistor, a type of resistor

• Positive train control, a type of train protection system
• Potential tropical cyclone, a term used since 2017 in NHC advisory products to describe a disturbance that is not yet a tropical cyclone

• Paid to click, payment for viewing advertisements
• Pass-Through Certificates, evidence of ownership of multiple Equipment Trust Certificates
• Piece to camera, spoken directly to a film or TV camera
• Players Tour Championship, in snooker
• Premium Tax Credit, Affordable Care Act provision
• Production tax credit, US, for renewable energy production

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