Setting shortcut keys for mostly used appplications
You can set shortcut keys for mostly used applications.Suppose to set shortcut key for calculator rigth click the calculator and choose properties.
Then select shortcut tab
,keep the cursor in the shortcut key text box and press any key that you want to be your shortcut and click ok.The key will be setted.Now you can press ctrl+alt+the keythat you pressed
to open calculator.You can apply this to your most recently used applications.