What means PHP ? ;-)

Hello ! I tell a lot of people that php is great and good and fast and effizent to make a web-site. All that stuff. The next question I always get is: "Okay, what does 'PHP' mean exactly ?". Even "non-computer-people" know that HTML means "HyperText Markup Language". But what the hell does PHP mean ? ;-) The manual (http://www.php.net/manual/preface.php) says: PHP stands for "PHP: Hypertext Preprocessor" which seems a bit stupid, since "Hypertext Preprocessor" doesn't start with a P ;-) Or is it a kind of a (funny ? nonsense ? intelligent ?) rekursion that PHP really stands for "PHP Hypertext Preprocessor" ? A book I got through my fingers says: PHP means "Personal Home Page", which sounds good, too. A lot of people try to make something like "Pretty Hypertext Preprocessor" or something like that. So.... what should I tell people who ask me ? ;-)) Martin