Abstract: A pushbutton user interface enables a user to preview the effect of activating a pushbutton of the interface before the pushbutton is activated. The pushbutton user interface can be implemented so that an input (preview input) to the pushbutton that does not produce an activation of the pushbutton is sensed and, in response to the sensed input, a preview is displayed that indicates the effect of activating the pushbutton. The preview input can be sensed using, for example, a force-sensitive resistor, potentiometer or strain gauge. The preview display can include, for example, a visual display, an audio display, a haptic display, or a combination of two or three such displays. The pushbutton user interface can be implemented so that the preview input and an activation input (i.e., an input that produces an activation of the pushbutton) are sensed as a result of an input to the pushbutton along the same axis or along different (e.g., orthogonal) axes.

Abstract: The invention facilitates browsing of an indexed collection of electronic content by displaying information identifying a current location within the collection of electronic content using a non-visual display (e.g., audio display and/or haptic display). The information identifying the current location can be displayed with variable resolution and the content of the display of the information identifying the current location can be dependent on the resolution. The invention can be used to browse any type of electronic content, including, for example, audio content, visual content, text content or some combination of such content. The invention can be used to browse electronic content that is indexed in any way, such as, for example, electronic content that is indexed (partly or entirely) alphabetically, numerically or by date.

Abstract: A pushbutton user interface enables a user to preview the effect of activating a pushbutton of the interface before the pushbutton is activated. The pushbutton user interface can be implemented so that an input (preview input) to the pushbutton that does not produce an activation of the pushbutton is sensed and, in response to the sensed input, a preview is displayed that indicates the effect of activating the pushbutton. The preview input can be sensed using, for example, a force-sensitive resistor, potentiometer or strain gauge. The preview display can include, for example, a visual display, an audio display, a haptic display, or a combination of two or three such displays. The pushbutton user interface can be implemented so that the preview input and an activation input (i.e., an input that produces an activation of the pushbutton) are sensed as a result of an input to the pushbutton along the same axis or along different (e.g., orthogonal) axes.