Comment: Re:What do you expect .. (Score 2) 196
The a/an rule of thumb is to use "a" if the next word sounds like it starts with a consonant, and "an" if it sounds like it starts with a vowel.
To English ears, a German speaker says "ooh ess bay", while an English speaker says "you ess bee". The y sound in this case is a consonant, so a native English speaker will say "a you ess bee stick".
All bets are off when the word following a/an starts with an h, since the letter can be silent or verbalized depending on the word and where you grew up.