International Union of Crystallography (IUCr) Serves the world community of crystallographers. http://www.iucr.org/

American Crystallographic Association Includes a newsletter, information on annual conferences, information on careers and positions available, and related links. http://www.hwi.buffalo.edu/ACA/

Society of Crystallographers in Australia Includes lists of officials, conference information, membership information, newsletters, and links to educational resources. http://www.sca.asn.au/

Czech and Slovak Crystallographic Association Association bulletin and crystallography resources. http://www.xray.cz/xray/cryst.htm

American Association for Crystal Growth Includes information on conferences, membership information, and a list of positions vacant in this field. http://www.crystalgrowth.org/

Special Interest Group on Aperiodic Crystals Modulated structures and quasicrystals http://www-xray.fzu.cz/sgip/aphome.html

Slovenian Crystallographers Homepage Description of the Activities of the Slovenian Crystallographers http://rcul.uni-lj.si/~fn01leban/slkr/index.html

The Egyptian Society Of Crystallography and Applications aims to follow scientific progress in the Crystallography and related activities. http://www.geocities.com/egyptiansca/

British Crystallographic Association Includes information about the activities of its groups, conference information, index and introduction to its newsletter, and related links. http://img.cryst.bbk.ac.uk/BCA/

Swiss Society for Crystallography Membership and meetings information. Site in English, French and German. http://www.sgk-sscr.ch/

European Crystallographic Association Includes minutes and reports of its executive council and groups, conference information, related news and lists of officials and rules, as well as membership information http://www.ecanews.org/

Special Interest Group on Mineralogical Crystallography Special Interest Group No. 5 of the European Crystallographic Association. http://www.lcm3b.uhp-nancy.fr/ecasig5/

International Workgroup on Mathematical and Theoretical Crystallography Reaserch themes, members, info about meetings. http://www.lcm3b.uhp-nancy.fr/mathcryst/

The Pittsburgh Diffraction Society News and information on conferences. http://www.pittdifsoc.org

Mark Hilge - Structural Biology X-ray structures of beta-Mannanase of Thermomonospora fusca in the free and substrate-bound form. http://www.mark-hilge.com/