The 8th International Conference on Software Composition, SC 2009, was held in Zu ]rich, Switzerland, during July 2-3, 2009. Over the years SC has become an important and inspiring forum for researchers, practitioners, and students working in the broad ?eld of software composition. This topic area was further exploredbybothhigh-qualitypaperpresentationsaswellastwoexcellentinvited speakers. In all, 34 submissions underwent a full review process by the Program C- mittee (PC). Only 10 were accepted for publication and presentation at the conference. The published papers were selected according to rigorous criteria covering relevance for the venue; contribution and innovation; precisionand c- rectness; and presentation and clarity. Eachpaper received between three to ?ve reviews, depending on whether authors were PC members. We endeavored to make SC 2009 a venue that encouragesand helps outstanding papers to be p- lished. This implied generating discussion when opinions expressed by the PC membersdiverge. Threepapersthatconveyedimportantinnovationsorscienti?c progress did not quite reach the quality levels we aimed for and were therefore shepherded by a PC member. We would like to thank the PC members who helped with this extra task. The successof SC 2009 wasalso due to two worldwide recognizedresearchers who presented a keynote presentation. Paul Klint from the Centrum voor W- kunde en Informatica (CWI), Amsterdam, and St ephane Ducasse, from INRIA Lille Nord Europe. Their knowledge and experience undoubtedly bene?ted the audience. SC 2009 was one of the events that were co-located with TOOLS Europe 2009."

Pharo is a clean, innovative, open-source, live-programming environment. Enterprise Pharo is the third volume of a series of book covering Pharo and its community. Whereas the first volume is intended for newcomers and the second volume covers deep topics of Pharo, this third volume covers libraries and frameworks for enterprises, and in particular those doing web development.