theodp writes "After a 10-year struggle, the USPTO was convinced to issue Google a patent Tuesday for Systems and Methods for Enticing Users to Access a Web Site, aka Google Doodles. Among other things, Google explains that the invention of co-founder Sergey Brin covers modifying a company logo with 'a turkey for Thanksgiving' and 'a leprechaun's pot of gold for Saint Patrick's Day.' To help drive home its point, Google included an illustration showing the USPTO that hearts could be displayed on the Google home page for Valentine's, which would be deja-vu-all-over-again for the 394 lovers who used the UIUC PLATO system on Feb. 14th, 1975."
"The number of Unix installations has grown to 10, with more expected."
-- The Unix Programmer's Manual, 2nd Edition, June, 1972