This volume constitutes the proceedings of the Second International Workshop on Cooperative Buildings (CoBuild 99) Integrating Information, Organizations, and Architecture held at the Carnegie Museum of Art in Pittsburgh on October 1 2, 1999. The success of the First International Workshop on Cooperative Buildings (CoBuild'98), held at GMD in Darmstadt in February 1998, showed that there is a demand for an appropriate forum to present research about the intersection of information technology, organizational innovation, and architecture. Thus, it was decided to organize a follow-up event. The...