Papers from a recent conference on program comprehension describe progress in software analysis, reverse engineering, software evolution, and software visualization. Papers are in sections on feature and concept analysis, dynamic analysis, conceptual models, and empirical studies, as well as mining software repositories, aspects mining, static analysis, visualization, and tool demonstrations. Specific subjects examined include mining software repositories for traceability links, a hybrid program model for object-oriented reverse engineering, and using Bayesian belief networks to predict change propagation in software systems. Other topics covered are recovery of workflows from multi-tiered e-commerce systems, interactive visualization of use cases, and metrics for measuring the effectiveness of decompilers and obfuscators. There is no subject index. Annotation ©2007 Book News, Inc., Portland, OR (booknews.com)