What does RPN stand for?

What does RPN mean?

RPN	Reverse Polish Notation Computing » General
RPN	Reverse Polish Notation Academic & Science » Mathematics
RPN	Registered Practical Nurse Academic & Science » Libraries
RPN	Registered Psychiatric Nurse Miscellaneous » Unclassified
RPN	Registered Parameter Number Computing » Networking
RPN	Registered Professional Nurse Business » Positions
RPN	Rosh Pina, Israel Regional » Airport Codes
RPN	Rich Partner Network Business » Firms
RPN	Real Professional Nurses Medical
RPN	Remote Plasma Nitridation Academic & Science » Physics
RPN	Risk Priority Number Business » General
RPN	Republican Party of Nigeria Governmental » Politics