From Belinda Barnet Computer-supported hyperlinks were around 20 years before Bill Atkinson's HyperCard (18 February, p 42). The hyperlink was invented in the early 1960s by Douglas Engelbart at the Stanford Research Institute in Menlo Park, California, for a revolutionary multi-user computer collaboration system called NLS. He demonstrated the concept - and also the computer mouse and screen-based computing - in a famous 1968 presentation.
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