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Hi.  If you are interested in space travel, like me, you will like this website.  It tells about the Mercury, Gemini, and Apollo programs. 

NASA's language

You may find abbreviations like CMP or LMP or P.  Well here is what they all mean:

CDP = Command Pilot

P = Pilot

CDR = Commander

CMP = Command Module Pilot

LMP = Lunar Module Pilot

CSM = Command-Service Module

LM = Lunar Module