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GUIDE was formed in 1956; it was incorporated in 1970 as a non-profit organization under the name of GUIDE International Corporation. At its peak GUIDE had a membership of around 2,000 companies and institutions.
In the US GUIDE ceased operation in September 1999. Although the groups did not merge, many of GUIDE's activities and projects were taken over by SHARE, and GUIDE suggested to its members that they join SHARE. In August 2000, SHARE took over the guide.org domain name.
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