Communication · 1998

Web search (Google PageRank)

Ranking pages by who links to them makes the whole web findable.

Larry Page and Sergey Brin's PageRank, published in 1998, treated links as votes weighted by the importance of the linking page, and Google was incorporated that September. Useful search made the growing web navigable; Google now handles several billion searches a day.

See it in the living treeWikipedia