Beej's Guide to Network Programming
If I'm not mistaken this original document was on Chico State's computer science domain. It was my understanding Beej went to Chico; does anyone know for sure? This was around long before 2006, I remember reading it around the year 2000 when I was first getting into C++. (miracle this quality of a document escaped anyone's brain in Chico -- I know, I went to CSUC. Let's just say it was hard to concentrate there :)