Introduction to principles of software engineering for mobile devices and best practices, including code reviews, source control, and unit tests. Topics include Ajax, encapsulation, event handling, HTTP, memory management, MVC, object-oriented design, and user experience. Languages include HTML5, JavaScript, Objective-C, and PHP. Projects include mobile web apps and native iOS apps. This is OpenCourseWare, licensed by David J. Malan of Harvard University under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported License. Visit http://cs164.tv/2012/spring/ for more material, including prior semesters and other courses.