What does RAD stand for?

What does RAD mean?

RAD	Ray Absorbed Distance Miscellaneous » Unclassified
RAD	A Rising Action Diagram Miscellaneous » Unclassified
RAD	rapid applications development Governmental » FDA
RAD	Redeemed And Delivered Miscellaneous » Unclassified
RAD	Rebelling Against Drugs Miscellaneous » Unclassified
RAD	Reactive Airways Disease Medical » Physiology
RAD	Roentgen Absorbed Dosage Governmental » NASA
RAD	Radius Governmental » NASA
RAD	Radiator Governmental » NASA
RAD	Radiation Dosage Governmental » NASA
RAD	Radar Governmental » NASA
RAD	Routine Aerial Distribution Governmental » Military
RAD	Radar Iron Limited Business » ASX Symbols
RAD	Rapid Application Development Computing » Software
RAD	Rules for Archival Description Community » Museums
RAD	Rules for Archival Description Academic & Science » Libraries