Today’s Google logo is a hat-tip to British logician and philosopher, and inventor of the Venn diagram, John Venn on his 180th birthday. Born on this date in 1834, Venn came up with the idea of using circles to sort groups to illustrate their relationship to each other sometime around 1880...
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Please visit Search Engine Land for the full article.
from Search Engine Land: News & Info About SEO, PPC, SEM, Search Engines & Search Marketing http://ift.tt/1qLtLA4
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