RPN

RPN may refer to:

• Reverse Polish notation, a.k.a. postfix notation, a mathematical notation
• ${\displaystyle \mathbb {R} \mathrm {P} ^{n},}$ real projective space

• Registered practical nurse, also referred to as a licensed practical nurse
• Registered psychiatric nurse

• Radio Philippines Network, Channel 9, Philippines
• Rancangan Perumahan Negara (National Housing Programme), a type of public housing in Brunei
• Recherche en Prévision Numérique, a numerical weather prediction research center in Canada
• Registered Parameter Number, as used in Musical Instrument Digital Interface synthesizers
• Risk Priority Number, as used in failure mode and effects analysis
• Rosh Pina Airport (IATA code), Israel

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