> **Possible Duplicate:**  
> [Do you use “a” or “an” before acronyms?](https://english.stackexchange.com/questions/1016/do-you-use-a-or-an-before-acronyms)  

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Why do we write 'He has an MA' and not ' a MA' even though MA does not begin with a vowel? Can anybody give me anymore examples like it?