During this mode, the user can cycle through windows of different applications by pressing the tab key.
From the en.wikipedia.org
Hit the tab key to show the available actions on the item.
From the techcrunch.com
This can be done by using the TAB key to move forward through the links on the page, and Shift-TAB to move backwards.
From the skysports.com
For the typewriter key, see tab key.
From the en.wikipedia.org
The key driver is an exploding tab for teacher pensions.
From the suntimes.com
Locating this key between the tab and shift is about as smart as locating the rat poison between the bubble bath and the sippy cup.
From the washingtonpost.com
The Tab key advances the cursor to the next tab stop.
From the en.wikipedia.org
Hold down the Control key while clicking on a URL and Firefox loads the page in a new tab.
From the newsobserver.com
In this example, if the keypunch operator typed a few characters at the beginning of the card and then pressed the skip key, the keypunch would tab to column 10.