PTT

PTT may refer to:

Chemistry and medicine

 * Partial thromboplastin time, a performance indicator in medicine for coagulation status
 * Photothermal Therapy, a medical treatment
 * 2β-propanoyl-3β-(4-tolyl)-tropane, a cocaine analogue
 * Polytrimethylene terephthalate, polyester
 * Pulse Transit Time, a measure of arterial blood pressure

Communication and technology

 * Postal Telephone and Telegraph, a government agency in many countries
 * Posterijen, Telegrafie en Telefonie (Netherlands), in the Netherlands
 * Postes, télégraphes et téléphones (France), in France
 * Postes, télégraphes, téléphones (Switzerland), in Switzerland
 * Posta Telgraf Teşkilatı (Turkey), in Turkey
 * PTT Bulletin Board System, the largest bulletin board system in Taiwan
 * Pneumatic tube, Pneumatic tube transport
 * Push to talk, or "Press-to-Transmit", a method of conversing on half-duplex communication lines
 * Pass-the-ticket
 * Platform Trust Technology, a firmware-based Trusted Platform Module (TPM) which is part of Intel Management Engine

Organizations

 * PTT Public Company Limited, a Thai oil and gas company
 * Pashtun Tahafuz Movement (PTM), also known as the Pashtun Tahafuz Tehrik (PTT), a human rights movement in Pakistan for the Pashtun people
 * Pennsylvania Tunnel and Terminal Railroad, the owner of the tunnels to New York Penn Station
 * Police Tactical Team, now Singapore Police Force's Special Tactics and Rescue unit
 * Prince's Trust Team, a development programme for teenagers by partners of the Prince's Trust throughout the UK

Sport

 * Port Talbot Town F.C., a Welsh Premier League football association club

Other

 * Petronas Twin Towers in Kuala Lumpur, Malaysia
 * Photothermal time, related to plant growth
 * Pull Tiger Tail, a British indie band