[EQ] "Everquest", a popular MMORPG

[EQ2] "Everquest2", a popular [MMORPG]

[equal to] {adj. phr.} Able to meet, do, or control; able […]

[equal to the occasion] {adj. phr.} Capable of handling the situation. […]

[error] See: [TRIAL AND ERROR].

[ETLA] "Extended three letter acronym", see [TLA].

[EULA] End-User License Agreement (a popular topic on many [MMORPG]s)

[evaporate into thin air] See: [DISAPPEAR INTO THIN AIR].

[eve] See: [ON THE EVE OF].

[even] See: [BREAK EVEN], [GET EVEN], [ON AN EVEN KEEL].