Does "ETA" stand for "Estimated Time to Arrival" or "Estimated Time of Arrival"? I most commonly hear phrases like "ETA 20 minutes", but I've also heard "ETA 4:30 PM". Is one usage correct and the other wrong, or are both okay?
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closed as general reference by MετάEd, Mehper C. Palavuzlar, tchrist, Matt E. Эллен♦, Kate Gregory Feb 22 '13 at 12:52
This question is too basic; it can be definitively and permanently answered by a single link to a standard internet reference source designed specifically to find that type of information.If this question can be reworded to fit the rules in the help center, please edit the question.
It's fine to use either format. ETA is used to answer the question, "When is X expected to arrive?", which can be answered either as, "In 20 minutes" or "At 4:30 PM". In other words, either usage is correct.
It's of, but that doesn't matter, because that allows both uses.
Fine, it's estimated that the person, item, etc. will arrive at 10:37.
Fine, there's an implied context of the current time, so it's the same as "The estimated time of arrival is 20minutes from now."