Toolbar

Many major search companies aim to gain marketshare by distributing search toolbars. Some of these toolbars have useful features such as pop-up blockers, spell checkers, and form autofill. These toolbars also help search engines track usage data.

Is a browser add on usually including a search box. See Google Toolbar for Internet Explorer and Google Toolbar with Mozilla Firefox

The row of buttons right below the menu that perform special functions quickly and easily.