Published online by Cambridge University Press: 25 April 2016
This triennium has been quiet but industrious. Information and understanding about star clusters and associations have advanced in a quantitative way, on a broad front that encompasses all their aspects. The tabulations given below refer to many of the well-known objects, for which improved data are now available, plus an impressive number of objects that heretofore have been little more than catalogue entries. Clusters and associations have always been the source, the stage, and the touchstone for the investigation of star birth, stellar evolution, populations, and galactic structure, and the data of the 1976 report of Commission 37 will figure in the scientific advances reported in 1979 by several other IAU Commissions.