He hit the nail on the head.I was once told "the only stupid question, is an unasked one"... anyway thought I'd share this:
9×19mm Parabellum - Wikipedia, the free encyclopedia
9x19mm Parabellum, 9mm, 9x19mm, 9x19 and 9mm Luger all seem to be used for the caliber according to this web-article.
The German language does have some long words!(DWM - the letters stand for a name that is long, mostly vowels and will cause you to drool and spit on your shirt).