RPN

RPN as an acronym may refer to:

• Registered Practical Nurse, also referred to as a licensed practical nurse
• Radio Philippines Network, Channel 9, Philippines
• Registered Parameter Number, as used in Musical Instrument Digital Interface synthesizers
• Registered Psychiatric Nurse
• Reverse Polish notation, a.k.a. Postfix notation, a mathematical notation
• Risk Priority Number, as used in failure mode and effects analysis
• Recherche en Prévision Numérique, a numerical weather prediction research center in Canada

RPN may also refer to:

• RPN, the IATA airport code for Rosh Pina Airport, Israel

• RPⁿ, Real projective space, in mathematics