* Astronomy

Text-powered search is so fundamental to life online that alternatives seem like far-flung fantasy.
Programmer Christian Langreiter, a 27-year-old Austrian, was hired by a European software company to make one alternative real. His creation: Retrievr, a search engine for images based entirely on visual input.
Retrievr sifts through photographs stored in Yahoo's Flickr database by using mouse-powered doodles as its search criteria.

Source
labs.systemone.at/retrievr