↑ 'The Best Browsers for Android: Rating Top-10'.

↑ 'Changelog for Opera 9.0 Beta 1 for Windows'.

↑ 'Opera 12.00 Beta for Windows Changelog'.

'The Programming Languages Beacon, v10.3'.

↑ 'Opera version history - Opera 1 series'.

Resizing: Users can use the zoom button to change the size of the text on the screen, also the ‘Fit to Width’ button is available to change the size of the web page to evade horizontal scrolling.

Blocking: Users can block unwanted spam and pop ups, and the blocking features allow the individual to inactivate certain elements.The order of the tabs can be changed, by dragging and dropping them in their needed location. Tabs: Users can save an unlimited number of tabs on their computer, so the next time that the users utilized their PC the pages will still be there.The user can decide to open the web page or not. When accessing a certain page opera will warn the user beforehand that the site may impose a threat to their computer. Security: Opera helps protect against computer viruses.With the release of Opera 4.0 in the year 2000, other operating systems were supported.

Opera was first released publicly with version 2.0 in 1996, which only ran on Microsoft Windows. In 1995, Opera became its own company called Opera Software ASA. Opera was created in 1994 at Telenor, which is Norway's largest telecommunications company. Opera is developed by Opera Software which is based in Oslo, Norway. There are also version for mobile phones, personal digital assistants, game consoles, and interactive televisions. These include Microsoft Windows, Mac OS X, Solaris, FreeBSD, and Linux. There are versions available for several operating systems. Opera is a web browser that formerly included e-mail, webfeed reader, and IRC Chat. Proprietary freeware with open source components

Opera web browser wiki