Sorry for being irritatingly SNOOT[1]ish but it's an _a_ (not an _an_) that you'll be needing there before that USB thingy because the U in USB is actually a y sound and you put an a before a y sound; viz. a yellow USB cable. Pauses, takes breath, exhales.

[1] http://harpers.org/wp-content/uploads/HarpersMagazine-2001-0...

oh, thanks for correcting ;) English isnt my native language so i might be forgiven :)

I dont really get why the U (which stands for universal) is a y sound. What is a y sound anyway ?

No problem :) Because it is pronounced youneeversal :) Also, same reason you should write a hospital (or a hotel, they are aspirated, not silent) and not an hospital (or an hotel) no matter what people try to tell you!

This gets problematic with some words, like "herb" where aspiration varies by location.