The ability of storing, managing and giving access to the huge quantity of data collected by astronomical observatories is one of the major challenges of modern astronomy. At the same time, the growing complexity of data systems implies a change of concepts: the scientist has to manipulate data as well as information. Developments of the "World Wide Web" bring answers to these problems. The book presents a wide selection of databases, archives, data centres and information systems. Descriptions are included, together with their scientific context and motivations. This volume should prove a useful tool for astronomers, librarians, data specialists and computer engineers.

1. Data from the ROSAT Observatory. 2. The EXOSAT Database System. 3. IRAS. 4. Databases from Cosmic Background Explorer (COBE). 5. The Many faces of the Archive of the International Ultraviolet Explorer Satellite. 6. Data Archive System for the Hubble Space Telescope. 7. Database Aspects of the Guide Star Catalog. 8. The HIPPARCOS INCA Database. 9. The SIMBAD Astronomical Database. 10. The NASA/IPAC Extragalactic Database. 11. The ESO Archive Project. 12. Archives of the Isaac Newton Group, La Palma and Westerbork Observatories. 13. Archiving at NRAO's VLA and VLBA Telescopes. 14. ESIS A Science Information System. 15. The NASA Astrophysics Data System. 16. The NSSDC Services. 17. The Space Data Centre at RAL. 18. Database Applications in Starlink. 19. Database Applications in Astronet. 20. Database Services at the Canadian Astronomy Data Centre. 21. Astronomical Bibliography from Commercial Databases. 22. Astronomical Directories. 23. Science Networks: A Short Overview. 24. User Interfaces in Astronomy. 25. The FITS Data Format. List of Acronyms. Index.