Unlike the investigations in many fields of astronomy, the work on star clusters offers few problems for practical international or inter-observatory co-operation. But there are two useful projects that the International Commission can undertake: the reporting of the researches in progress at the various observatories, and the co-operative listing of useful categories of research on star clusters. The list may serve as a guide for new workers in the field. Also there is, of course, much value in the mutual discussion of researches. Such interchange of ideas may be the most useful outcome of the Commission’s conferences at the Zürich meeting of the International Astronomical Union.