http://developers.slashdot.org/article.pl?sid=02/10/29/2052239&mode=thread&tid=169 "Yahoo has decided to switch from a proprietary system written in C/C++ to PHP for their backend scripting. Here's the notes from a presentation by a Yahoo engineer at PHP Con 2002." http://public.yahoo.com/~radwin/talks/yahoo-phpcon2002.htm