
             BACKGROUND
  Computer experts know that when reading a computer book, the 
really interesting stuff is usually hidden in the back of the 
book, buried in the appendices, which are secret vaults full of 
fascinating treasures, hidden from the view of casual readers 
duped into assuming that the appendices contain ``nothing 
important''.
  In this book, too, some of the most brilliant jewels are hidden 
in the appendices.
  Here are the appendices. I hope you enjoy them. I was afraid to 
move them to the front of the book because some of them are 
tough, controversial. But so are computers!
  Enjoy the final leg of your adventure.