1. Usually about five spaces wide, a tab is an indentation at the beginning of a line of text to signify a new paragraph in a document or to help create equal spacing between multiple lines. When formatting marks are visible tabs are represented by an arrow, as shown in the example picture to the right.
2. In a software program window and on an Internet browser, a tab allows for the user to access different parts of a menu, display, or webpage. Below is an example of what tabs may look like in a Microsoft Windows setting.
Tip: Use the keyboard shortcut Ctrl + Tab to switch between open tabs in a document or web browser.
3. With Internet browsers a tab refers to an open window in tabbed browsing.
4. A tab is a keyboard key that inserts a tab character or advances the cursor to other tab settings on a line. This key can also move between selectable items in a dialog box. The picture shows an example of what the tab key looks like.
5. A tab is a plastic piece used to enable/disable write-protection on floppy diskette drives.
6. When referring to a command tabs is a Linux command that sets tabs in the terminal. See the tabs command for further information.