Today in 1993 Marc Andreesen announced the NCSA Mosaic browser and introduced the HTML image tag. Mosaic quickly subsumed all text-oriented information search tools and surpassed them. Because it was easy to install, ported to several major operating systems and supported by a large institution (National Center for Supercomputing Applications, NCSA), it became the first graphical user interface for the Web. It has been described as the killer application of the 1990s.