What does ER stand for?

What does ER mean?

ER	Eritrea Regional » Countries
ER	Emergency Room Community
ER	Endoplasmic Reticulum Medical » Physiology
ER	Emergency Room Medical » Hospitals
ER	Estrogen receptor Medical » Laboratory
ER	Erie Governmental » Suppliers
ER	Emergency Response Governmental » US Government
Er	Erbium Academic & Science » Chemistry
ER	Entity Relationship Computing » General
ER	External Relations Business » International Business
ER	Extended Range Governmental » Military
ER	Ever Ready Governmental » Military
ER	English Russian Regional » Language Codes (2 Letters)
ER	Easy To Read Miscellaneous » Unclassified
ER	Easily Replaced Business » Positions
ER	External Rotation Medical » Physiology
ER	Emergency Rescue Community
ER	Extended Release Miscellaneous » Unclassified
ER	Enhanced Response Medical » Physiology
ER	Emergency Rule Governmental » State & Local
ER	Explicit Rate Business » Accounting
ER	Earth Resource Academic & Science » Meteorology
ER	European Russia Regional
ER	Electro Rheological Governmental » Military
ER	Earthquake Relief Community

er(interj.): (used to express or represent a pause, hesitation, uncertainty, etc.)