Did you know that a billion means a thousand million in the U.S., but a million million in most countries? So, unless you're communicating to a strictly American audience you'll be writing out those zeros.
Why, yes! I am study for my Technical Writing DSST at the moment. How did you guess? ;-)
And in other news, I shot a wedding last weekend and am making a friend's prom dress! Life is crazy busy. I'm so glad that the sun is still shining at 18:30. Spring is coming!
Oh, and Happy St. Patrick's Day!