Examples of browsers include Microsoft Internet Explorer (IE), Google Chrome, Safari, and Mozilla Firefox. Most browsers have multiple versions as well, for example, Internet Explorer has IE7, IE8, IE9, and IE10.
In most cases, you can simply find the drop down menu, or "Help" tab, on your browser, and look for the "About" link, for example: "About Google Chrome", "About Internet Explorer", etc. This will tell you exactly which browser you are using.
If you need more help, here's a link to help: http://www.bbc.co.uk/accessibility/guides/which_browser.shtml
Good luck, and if you need more help, feel free to ask us by using the "Contact Support" link.