— Scott McNealy, Sun Microsystems Chairman, President and ceo

tech editing: 
Jessica and Valentin

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the 
intro
you are here
4
xxxi
Other people to blame:
At O’Reilly:
Our biggest thanks to 
Mike Loukides
at O’Reilly, for taking a 
chance on this, and helping to shape the Head First concept into 
a book (and series). As this second edition goes to print there 
are now fi ve Head First books, and he’s been with us all the way. 
To