Talk:Scanner Room/@comment-70.95.12.240-20161018233624/@comment-30732810-20170509124509

As Derailed as this comment chain is, it's actually 'a' for BOTH American and UK English.

http://www.grammar.com/a-vs-an-when-to-use/ (pay special attention to the middle 'Words that start with H section.')

So in the case of the word 'HUD,' the first (and only) sylible has the empasis when it's being said in normal comversation, so it is 'a HUD upgrade.'