Abstract: Methods and systems consistent with certain principles related to the present invention enable a portable computer device to retrieve, store and display electronic sheet music. The portable computer device may access electronic sheet music directly or indirectly from a Web server that provides the sheet music. The portable computer device may store the accessed sheet music locally for displaying on a display. The lighting level of the display may be adjusted by a user such that the user may view the sheet music under various ambient light conditions. Also, the portable computer device includes a page turner that is controlled by the user's foot. The page turner may allow the user to scroll through images of the sheet music presented on the display using their foot, thus allowing the user to use their hands for other purposes, such as playing an instrument.

Abstract: Local to long-distance interconnections at the remote units are effected without necessity of voice connections through the centrally located processing unit.

Abstract: A centrally located processing unit controls the use of long-distance communication circuits and records the use of the circuits. The centrally located processing unit selects the least expensive telephone line available and instructs the remote satellite to thereby insure the optimum use of bulk rate communications lines. Where no desired bulk rate communication facility is available, a user enters a call-back number into the processing unit and is called back at that number when the facility becomes available.