1. A method for performing a computer action based on a user input on a touch screen of a computing system, the user input entered by a user by holding the computing system in a right or left hand and touching the touch screen with the other hand, the method comprising the steps of: the computing system receiving the user input on the touch screen of the computing system, wherein the touch screen is capable of displaying information; the computing system receiving a shape of the user input on the touch screen; the computing system determining which hand is used to enter the user input on the touch screen; the computing system receiving an angle of rotation of the computing system with respect to gravity during entry of the user input; the computing system determining a specific computer action to perform, based on the specific computer action being associated with predefined input parameters corresponding, within a specific error tolerance, to: the received shape of the user input on the touch screen, the determined hand used to enter the user input on the touch screen, and the angle of rotation of the computing system with respect to gravity during entry of the user input on the touch screen; and the computing system performing the specific computer action.