Understanding the Linux Kernel By Daniel P. Bovet and Marco Cesati Following are the changes made in the 3/01 reprint. Here's a key to the markup: [page-number]: serious technical mistake {page-number}: minor technical mistake : important language/formatting problem (page-number): language change or minor formatting problem ?page-number?: reader question or request for clarification (Cover) Top of front cover; Number "0" was used instead of letter "O" in I/O on line "From I/O Ports to Process Management". It has been changed to the letter "O".