Will wonders never cease, eh? Reading through some comments on Bad Astronomy BLOG I came across this . "11 kilopicoseconds as Earth’s escape velocity makes no sense. http://lamar.colostate.edu/~hillger/correct.htm" At first I didn't understand what the commenter was talking about. "kilopicoseconds, wtf" I thought to myself. After reading the colostate URL info it struck me, Phil had written "11 kps" in his blog. "The symbol for a compound unit that is a quotient of two units is indicated by a solidus or by a negative exponent. * RIGHT: km/h or km·h-1 (for kilometers per hour) * WRONG: kmph or kph (do not use p as a symbol for "per".) * BUT: It is correct to say or write "kilometers per hour"." I know lots of people that use p as "per" but now I know better. I'll stick with the "/" in the future.