This book constitutes the refereed proceedings of the 2nd International Symposium on End User Development, IS-EUD 2009, held in Siegen, Germany in March 2009.

Invited Talks.- End-User Development and Meta-design: Foundations for Cultures of Participation.- What Is End-User Software Engineering and Why Does It Matter?.- Refereed Papers.- Mutual Development: A Case Study in Customer-Initiated Software Product Development.- Appropriation Infrastructure: Supporting the Design of Usages.- Supporting End Users to Be Co-designers of Their Tools.- Improving Documentation for eSOA APIs through User Studies.- End-User Development of Enterprise Widgets.- End-User Development for E-Government Website Content Creation.- LWOAD: A Specification Language to Enable the End-User Develoment of Coordinative Functionalities.- Shaping Collaborative Work with Proto-patterns.- Web Design Patterns: Investigating User Goals and Browsing Strategies.- Males' and Females' Script Debugging Strategies.- Hypertextual Programming for Domain-Specific End-User Development.- Fast, Accurate Creation of Data Validation Formats by End-User Developers.- Refereed Notes.- Cicero Designer: An Environment for End-User Development of Multi-Device Museum Guides.- Observing End-User Customisation of Electronic Patient Records.