Pseudo Random Noise 
printer 
Pulse Range Navigation 
PARTNER 
pseudo-random noise 
as needed 
Pesticide Registration Notice 
Prentice Electronics 
Pro re nata 
Program Release Notice 
Provide Roaming Number 
Pseudo Random Number 
IATA code for Mac Crenshaw Memorial Ai… 
IATA code for PriÅ¡tina International… 
Packaging Recovery Note 
Packet Radio Network 
papillary renal neoplasia 
paramedian reticular nucleus 
Parent Resource Network 
Parts Reference Number 
pertactin 
Pirinair Express 
Pittsburgh Rens 
plaque reduction neutralization 
Plutonium retention number 
Policy Research Network 
Postal Routed Network 
post-rotatory nystagmus 
Practice Research Network 
Practitioners Reporting Network