A second edition of this book has given me the opportunity to respond to suggestions from both students and correspondents from around the world, fromdisparateregionsrangingfromScotlandtoHawaii. Sincethe time of the ?rst edition written in the late 1990s, the Microchip PIC range has become the largest volume selling 8-bit MCU. The mid-range f- ily used in the original edition has continued to expand vigorously, with some of the exemplars used becoming essentially obsolete. In addition, the enhanced-range 16-bit instruction line has been enlarged from vir- ally nothing to form a signi?cant...