This is a brief listing of terms used at this site. Proper definitions for most of them can be found in Joint Pub 1-02 (the DoD dictionary) or JP 3-50 (joint doctrine for personnel recovery)–that document is available in the References section of the home page
PERSONNEL RECOVERY: The sum of military, diplomatic, and civil efforts to prepare for and execute the recovery and reintegration of isolated personnel. That definition is inclusive of US military, Department of Defense civilians and contractor personnel (and others designated by the President or Secretary of Defense) who are separated from their unit (as an individual or a group) while participating in a US sponsored military activity or mission and are, or may be, in a situation where they must survive their isolation, evade capture, resist their captors efforts to exploit them, or escape from captivity
CSAR: Combat Search and Rescue
DoD: Department of Defense
GCC: Geographic Combatant Commands (i.e. US Central Command, US Africa Command, US European Command, US Southern Command, US Northern Command, US Pacific Command)
NGO: Non-governmental Organization (typically used to refer to humanitarian organizations like the Red Cross, Doctors without Borders, etc.)
TRAP: Tactical Recovery of Aircraft and Personnel