Together, they created an algorithm dubbed PageRank (after Page).
Fiddling with the results, they realised they had also stumbled on a querying tool which gave results that were more relevant than existing search engines like AltaVista and Excite.
This inspired the founders to name their new engine Google, after googol, the term for the numerical 1 followed by 100 zeroes.
Image: The Google logo is displayed on a giant screen outside Nasdaq | Photograph: Stan Honda/AFP/Getty Images
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