CDS (Centre de Données Astronomiques de Strasbourg) is the oldest European astronomical data center (founded 1972). Like NASA-ADC, the CDS archives some 680 astronomical catalogs (comprising a total of about 3 Gbyte of data, not including very large data sets such as the IRAS sky maps or the Green Bank radio survey images). Access to most catalogs is offered via anonymous FTP to cdsarc.u-strasbg.fr (130.79.128.5) in the subdirectory /pub/cats. CDS has recently started to archive files in subdirectories directly named after their published location, e.g., /pub/cats/J/A+AS/90/327 has tabular data published in A&ASVol. 90, p. 327. As of June 1994 there are 250 such ``J-files''. As all other catalogs, these are listed in the file cats.lis. Get the file ReadMe for further information. For example, to retrieve catalog VII/140 (which is the same as A7140 at NASA-ADC), type cd pub/cats/VII/140 and then mget * to copy all files related to that catalog to your computer. Note that some files in the CDS archive (those ending in ``.Z'') are compressed and that such files should be retrieved with FTP's binary mode. Use the UNIX command uncompress <file_name> to convert them to plain ASCII. For questions or requests for catalogs listed in cats.lis, but not yet available in the FTP archive contact SIMBAD::QUESTION or question@simbad.u-strasbg.fr. CDS produces a regular journal, the Bulletin d'Information du CDS (BICDS), which informs about new catalog acquisitions and related items. A regular e-mail circular with a listing of new catalog acquisitions can be ordered from cats@simbad.u-strasbg.fr or copied directly from file cdsarc.u-strasbg.fr:pub/cats/cats.new. CDS has recently defined documentation standards for catalogs (Ochsenbein 1994) which can be found in cdsarc.u-strasbg.fr:pub/cats/doc.tex. [References: Ochsenbein (1993a,b); Egret and Ochsenbein (1994).]