This is the first book-length work on a promising new technology that is likely to change the way people interact with computers and the programs that run on them: Programming by Example, or PBE. PBE is a set of capabilities that can be built into an application, allowing it to adapt itself to the way it is used. For instance, if it finds that a user regularly repeats a complex series of steps, it can automatically re-program itself to make the required steps shorter and simpler.<P>Inside, contributed chapters from leading PBE researchers bring the reader completely up to date on the latest developments in the field, reviewing the current technology and mapping its future directions. Your Wish is My Command will make for fascinating and ultimately practical reading for academics working in HCI and AI and professionals working on challenging software and hardware design issues.