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( The latter descriptions were developed in the 1950s when volumes were typeset in hot metal and printed on letterpresses . " A BT spokesperson crowed that the firm " patented the principle of the hyperlink in the mid-70s when people were still wearing kipper ties and flares . It became coeducational in 1963 when laws were amended to authorize admission of both men and women at all levels of instruction on all North Carolina State University campuses . The ability of DECoRuM to calculate SAP energy ratings and predict energy savings and cost-benefits resulting from energy efficiency measures and deployment of renewable energy technologies , could be utilised by surveyors and real estate professionals when preparing home condition reports as part of the home information pack that home sellers and their agents will be required to have available from 2007 when homes are marketed for sale . It is also a movement , a nonviolent army , struggling with how to build a national organizational structure and process based on direct democracy , consensus and as much decentralization as possible in a country as big as this one when people are not together in one city planning for an action .