What does MERS stand for?

What does MERS mean?

MERS	Mortgage Electronic Registration System Business » Mortgage
MERS	Mobile Emergency Response System Community
MERS	Marine and Environmental Remote Sensing Academic & Science » Ocean Science
MERS	Mobile Emergency Response Support Governmental » State & Local
MERS	Micro-Electronic Receiver Switch Academic & Science » Electronics
MERS	Microwave Earth Remote Sensing Academic & Science » Geology
MERS	Most Economical Route Selection Computing » Telecom