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Since user starts with a vowel shouldn't we use "an" ? I've seen many cases of using "a" .

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marked as duplicate by Roaring Fish, J.R., Carlo_R., Andrew Leach, tchrist Feb 24 '13 at 14:26

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

2 Answers 2

up vote 24 down vote accepted

From Amerenglish:

"An" goes before all words that begin with vowels:

  • An egg

With two exceptions:

When u makes the same sound as the y in you, or o makes the same sound as w in won, then a is used:

  • a union
    • a united front
    • a unicorn
    • a used napkin
    • a U.S. ship
    • a one-legged man
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2  
Please include a reference to your source when you cite another website literally. –  Cerberus Sep 6 '13 at 17:32
    
Absolutely. Will do. –  Benyamin Hamidekhoo Sep 6 '13 at 17:33
    
An user did sound incorrect; It is nice to be right. –  this Jun 2 at 16:44

It's a because the first sound of user is not a vowel, but the consonant /j/.

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