Opera is an excellent browser from Norway. It has the characteristics of fast speed, saving system resources, strong customization ability, high security and small size. It is currently one of the most popular browsers. Multiple file interface (MDI), convenient zoom function, integrated search engine, keyboard cross-section and mouse browsing function, next time you can start from the last browsing progress when the computer crashes, prevent pop-up, Fullscreen, support for HTML standards, integration E-mail and news groups, as well as allowing users to customize the arrangement of interface buttons, skins, toolbars, etc., are special features that Opera has loved for many years. For users who have further research on Internet technology, Opera is also a rare and good tool, including HTML standard verification, support for WML (WAP), the ability to create related windows, display window size and other functions, which is helpful for those who design web pages. The benefit is great. The series of functions carefully designed by Opera for visually impaired users are also a feature. It is also worth mentioning that in addition to Windows, Opera also supports desktop operating systems such as Linux and Mac, which is worth waiting for. In addition, the Nokia 9210i launched in Europe and the United States also has the built-in Opera browser on the Symbian operating system, which shows the strength of Opera in browser technology.