© 2010 Elsevier Inc. All rights reserved.

Material in the work originally appeared in:

For Chapter 3, Proceedings of the 18th Annual ACM Symposium on User Interface Software and Technology (© ACM 2005),

For Chapter 4, Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (© ACM 2006), and “CoScripter: automating & sharing how-to knowledge in the enterprise,” in Proceedings of the Twenty-Sixth Annual SIGCHI Conference on Human Factors in Computing Systems (© ACM 2008),

For Chapter 5, Proceedings of the 17th Annual ACM Symposium on User Interface Software and Technology (© ACM ...

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