I've always hated seeing people use acronyms that I don't understand. For example, someone might send you an email saying "Do you know when this is, TIA!" and you may be left wondering, what does TIA mean?
For cases like this, I use the site acronymfinder.com. You can put in just about anything and get an answer!
For example, TIA means Thanks In Advance.
I always had a professor talking about "WYSIWYG" and I had to look that one up.
It's an interesting site, to say the least, and much more specialized than just "Googling" something.