What does E stand for?

What does E mean?

E	Air dose–radiation Medical » British Medicine
E	Atmosphere layer 55 to 85 miles up Academic & Science » Amateur Radio
E	Atmosphere layer 55 to 85 miles up Academic & Science » Meteorology
E	Auftrag erledigt International » German
E	Earl Business » Positions
E	Early Miscellaneous » Unclassified
E	early Genetics Medical » British Medicine
E	Earnings Business » Accounting
E	ears, nose and throat–UK Medical » British Medicine
E	Earth Academic & Science » Astronomy
E	Earthed (electrically grounded) Academic & Science » Electronics
e	ease, earl Community » Genealogy
E	Easier Miscellaneous » Unclassified
E	Easily Miscellaneous » Unclassified
E	East Governmental » Transportation
E	East Governmental » NASA
E	Easter Community » Religion
E	Eastern Community » Religion
E	Eastern Community » Sports
E	Eastern Community » Media
E	Eastern Academic & Science » Meteorology
E	Eastern Academic & Science » Ocean Science
E	Eastern Academic & Science » Universities
E	Eastern Governmental » NASA
E	Eastern Governmental » Transportation