The composition of this commission reflects the wide appeal of science history studies and the need for interdisciplinary approach, especially in the studies of ancient and medieval astronomy, where combined scientific, philological and historical competence are necessary conditions. This is why the commission lists over thirty consulting members, historians of science by profession and academic training. The commission is recognized by the IUHPS as a joint commission of both Unions, with a representative of this organization in our Organizing Committee. 69 IAU members, together with the group of consulting members mentioned above, make up for an unusually numerous body. It should be noted that this size is undesirable in some respects and it may call for a general reevaluation.