A Web browser is a program for retrieving information on the World Wide Web. As you probably know, you are using a browser right now to view this document. To find this document, you have most likely used your mouse to click on a number of links. Having several browsers installed on your computer, and using them, is quite possible. Note, however, that some browsers, though not Opera, may try to take control and set themselves up as your default browser.
All browsers have toolbars with a collection of buttons and fields.
These buttons perform the most commonly used and most useful functions related to surfing the Web. Browsers keep a record of a certain number of pages you have visited. Note, however, that going forward is only possible after first having gone back. It's easy to get lost on the Internet. But it's even easier to get home.