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Published online by Cambridge University Press: 12 April 2016
The purpose of the present paper is to present a review of the existing data centers.
If one knows nothing about a subject, one makes an enquiry, and this is exactly what I have done. The list of addresses to start with was provided by Dr. G.A. Wilkins, chairman of the Working Group on Numerical Data of IAU Commission 5, who had collected a list of data services. I want to thank all colleagues who have answered the questionnaire, which is the basis of the present paper; the answers (and the questionnaire itself) are reproduced in Appendix A of this paper.