The pervasive connection of Close Binary Stars (CBS) with essentially every fundamental field of astronomy and astrophysics has required a huge number of papers on many topics to be considered for this report. As a consequence, most of the invited contributors were forced to use more space then alloted. This coupled with the tight contraints imposed by the crckapb style did require the Commission’s President to make possibly controversial and certainly painful choices on how and where to make some unavoidable cuts. In particular, I had to drop most of the authors’ names in the references throught the text. This much suffered but necessary decision resulted in a 20% reduction of the report length. I hope that only a minority of C42 members will not share my choice. Since the various contributions were already quite concise, the remaining alternative was that of dropping some of the science, a choice I did actually consider, I must confess, only briefly.