RPN may refer to:
Science and technology
- Real projective space (), a type of topological space
- Reverse Polish notation, a.k.a. postfix notation, a mathematical notation
- Registered Parameter Number, in MIDI
- Recherche en Prévision Numérique, weather forecasting research service, Canada
- Risk priority number in failure analysis such as FMEA, taking into account the severity, probability and detection probability of a failure event
), a type of topological spaceNursing
- Registered practical nurse, nursing title
- Registered psychiatric nurse, nursing title specialising mental health
Other uses
- Radio Philippines Network, Channel 9
- Rosh Pina Airport (IATA code), Israel
- Rancangan Perumahan Negara (National Housing Programme), public housing in Brunei
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