PR1
PR1 or PR-1 may refer to:
- Polskie Radio Program I, a radio channel broadcast by the Polish public broadcaster Polskie Radio
- the first group of plant pathogenesis-related proteins
- the first of three categories of para-rowing, also known as adaptive rowing
- VR Class Pr1, a Finnish locomotive
- Puerto Rico Highway 1, a road connecting the city of Ponce to San Juan
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