Z39.50 Maintenance Agency the ANSI/NISO Z39.50 (ISO 23950) information retrieval protocol standard, maintained at the Library of Congress. http://lcweb.loc.gov/z3950/agency/

Global Information Locator Service (GILS) the GILS home page. http://www.gils.net/index.html

Global Change Master Directory Guided directory search. http://gcmd.gsfc.nasa.gov/

Glasgow IDOM Links related to Information Retrieval, thanks to Mark Sanderson. http://www.dcs.gla.ac.uk/idom/ir_resources/