Patent ID: 7710393

Claim:
A method of scrolling through portions of a data set to be displayed on a pocket sized portable device having a display and a rotational input that can be continuously actuated by a circular motion of a finger through 360 degrees of rotation, the method comprising: receiving a number of units associated with a rotational user input, the rotational user input being provided by a user through interaction with the rotational input, determining an acceleration factor associated with the rotational user input, wherein the acceleration factor is dependent upon a rate of speed of the rotational user input, and the acceleration factor provides a range of acceleration, modifying the number of units by the acceleration factor, determining a next portion of the data set based on the modified number of units, presenting the next portion of the data set, and providing at least audio feedback or visual feedback via the display for the user of the portable device as interaction with the rotational input occurs.