As you design your site, keep in mind that viewers come to your pages with a variety of computers, operating systems, and monitors. Ensure that your site is accessible to all your potential viewers by testing your pages on a variety of systems. If you want to attract a large audience to your site, you need to ensure that it looks good on a broad range of systems. A design that looks great in Navigator 4.0 and higher may be unreadable in Internet Explorer 3.0. And many people still use old browsers because they haven't bothered — or don't know how — to download new versions.