PT
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Pt or PT may stand for:
- Portugal, ISO country code
- the Periodic table
- Portuguese language
- Portugal Telecom
- Partido dos Trabalhadores (Worker's Party of Brazil)
- physical training, US military term for its exercise programs
- PT boat, a type of small fast ship used by the US Navy in World War II
- Prothrombin time, a measurement of blood coagulation
- Platinum (Pt)
- Polythiophene (PT)