What does USRD stand for?

What does USRD mean?

USRD	Upper Snake River District Governmental » State & Local
USRD	Underwater Science, Research & Development, Inc. Academic & Science » Ocean Science
USRD	Universal Sensor Remoting Device Academic & Science » Electronics
USRD	Underwater Sound Reference Division, Naval Undersea Warfare Center Academic & Science » Ocean Science
USRD	Underwater Sound Reference Division, Naval Undersea Warfare Center Governmental » Military
USRD	Underwater Science, Research, and Development, Inc. Business » Firms