Published ahead of its time, this trendsetting textbook was first introduced to electrical engineering, computer engineering and computer science instructors in 1999. Since then, Patt and Patel'sIntroduction to Computing Systems: From bits & gates to programming & beyondhas changed the curriculum. In some cases it has even created new introductory courses, while in others it has enhanced existing courses from introductory programming to computer organization, fulfilling the authors' vision for a modern approach.The Third Edition maintains the "motivated" bottom-up approach, showing students how a computer works through access to a simulator and by giving them hands-on programming experience with the C language. The authors first introduce the underlying structure of a computer, and then build on that foundation to present programming methodology, as stated, using the C language. Every step of the way, students learn new things, building on what they already know. The authors feel that this approach encourages deeper understanding and downplays the need for memorizing. Students develop a greater breadth of understanding, since they see how the various parts of the computer fit together.In an effort to further serve different course needs, teaching flexibility has been added to the Third Edition through additional examples and exercises, as well as new supplementary material related to topics such as C++ and computer organization.