Meaning Estimated time of arrival
Type Acronym
Rank ★ ★ ★  Common
Usage General (not just online)
Comments A quick way of saying when you plan on arriving at a certain location; may be used to tell a friend that your ETA is 7:15 while you are on the way to his house.
Updated December 12, 2013
Meaning Edited to add
Type Acronym
Rank ★ ☆ ☆  Uncommon
Usage Online Only (chat, messaging, e-mail)
Comments Means something has been edited before being added, possibly for censorship or privacy reasons.
Updated December 16, 2013