CHICAGO, Dec. 28 (UPI) -- Fifteen years ago this Christmas week, Tim Berners-Lee, an obscure scientist working in a European laboratory, invented the Internet browser, now a fixture of the digital economy, experts tell United Press International's The Web.

Sir Berners-Lee today still lives a simple professor's lifestyle, bicycling around town, as his browser was supplanted by the Mosaic browser developed by a college student, Marc Andreessen at the University of Illinois, a few years later. Andreessen's invention led to the creation of Netscape, the Netscape Navigator and other technologies that enervated to the go-go 1990s run in investment in technology on Wall Street and the creation of millions of jobs and hundreds of Internet companies here and abroad, including now household-names eBay.com and Amazon.com. By Gene Koprowski