This book is developed around Microchip"s latest family of parts, the PIC18FXXX family. It focuses on the PIC18F452, a new part brought to market in May 2002. It is intended that the reader will find a smooth path to the creative process of writing enhanced application code. This book attempts to organize and unify the development of these three capabilities: to understand and use components, to exploit powerful algorithmic processes, and to break down the complexity of an instrument or device so as to meet its specifications. The book is dedicated toward the development of creative design capability. Throughout this book, the approach taken is to introduce a template of assembly language code that encompasses a set of features of the PIC18F452 plus its interactions with some of the I/O devices resident on a small 4"x4" development board. For electrical engineers who work with the PIC18FXXX family.