If you open two programs at the same time what do u do without a mouse?

Press Alt and tab together in the keyboard to see all opened programes.

To shift between two programs we use Ctrl + Alt + Tab.

And next do the job in required program.

there is many shortcuts you can use when missing a mouse .

use ALT + TAB to switch between your open windows

ALT + F4 to close any window

WIN + M to minimise

WIN+ D to go to desktop

or you can use more advanced way to use the sticky ( tab SHIFT5 times ) then you can use a portion of your keyboard as a mouse usually the keypad (0 -9)

In this case the user will have to use alt+tab key to switch between the tow programs to make active one of the desired program.

hold and use the ctrl  + tab key to toggle between opened tabs and also press and hold the alt + tab key to toggle between opened windows running programs. Again also if you are using windows xp or vista or7 or8 you can tap the shift key5 time to activate sticky key this permits you to use one portion of your key board as a mouse usually the number pad

Use the keyboard. Press Alt + Tab to toggle between the opened programs. 

it.s to easy i.used keyword  if use laptop and if hav.t laptop i.can used pc tooles

Just click or tap your mouse pad for you to open another program and you can minimise your other program for you to show the other program.