The world's most famous search engines celebrated its 21st anniversary, changing its logo to a Doodle image of an old computer with the old engine logo.
The Google search service was officially launched on September 27, 1998 by Larry Page and Sergey Brin, who were studying at Stanford University in California.
Google is one of the most visited sites in the world, and Alpha Pitt is one of the top four technology companies in the world.