What does RFID stand for?

What does RFID mean?

RFID	Radio Frequency IDentification Governmental » US Government
RFID	Radio Frequency IDentification Business » Products
RFID	Radio Frequency IDentification Academic & Science » Electronics
RFID	Radio Frequency IDentification Academic & Science » Libraries
RFID	Radio Frequency IDentification Governmental » Military
RFID	Radio Frequency IDentification Medical » Hospitals
RFID	Radio Frequency IDentification Academic & Science » Ocean Science
RFID	Radio Frequency IDentification Community » Media
RFID	Radio Frequency IDentification Business » General
RFID	Radio Frequency IDentification Computing » Security
RFID	Radio Frequency IDentification Governmental » FDA
RFID	Really Freaking Immense Datasets Miscellaneous » Funnies
RFID	radiofrequency identification Medical » British Medicine