Although they created text and graphical browsers, it was the release of NCSA's Mosaic for X-windows by Marc Andreessen and Eric Bina in 1993 that ignited the web explosion. Mosaic was well-publicised and its 'point and click' interface, familiar to PC users, made it a very pleasant and easy to use browser. Marc cofounded Netscape Communications Corporation in April 1994. These are the two most popular browsers, although they have been much criticised for their poor standards support. Institutes and organisations with web sites range from the White House to NASA to 'virtual libraries'.
Companies maintain web sites to promote products, offer services, and sell goods.
The Web is huge, and it has information on almost anything you can think of. There are millions of computers on the Internet. There is no central control or authority. In fact, you can publish your own information on the Web, using HTML . If you have no specific URL then perhaps you'll use one or more portals or search engines .