2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/9904Current extragalactic databases are reviewed, including object-oriented databases, astronomical catalogues and compilations, as well as image archives and object catalogues from large-scale surveys. One challenge of the future will be to maintain the accessibility of all published information on individual objects; the other will be the cross-identification between various ongoing and planned large-scale surveys, some of them resulting in several hundred million objects each. Powerful user interfaces are being developed to tackle these tasks.8 pages; compressed uuencoded PostScript; accepted for Proc. "World of Galaxies - II", Lyon Sept 5-7, 1994; Astrophysical Lett. & Comm. 1995, eds. G.Paturel & C.PetitAstrophysicstext