Audio tapes featuring music; Battery monitoring devices that may be attached to a battery to monitor the performance of the battery and operating software for use therewith, sold as a unit; Compact discs featuring music; Compact discs featuring music and spoken word in the form of poetry; Computer software that assists computers in deploying parallel applications and performing parallel computations; Computer telephony software; Digital music downloadable from the Internet; Digital music system that synchronizes digital music files stored on a home unit and a car unit; Digital music systems that synchronizes digital radio files stored on a home unit, a car unit, or portable unit and that may be backed up to an internet depository; Integrated battery backup systems comprising a battery, an electronic measurement apparatus for use in the measurement of battery health and performance, and a remote computer software program that uses the foregoing data to trend, predict, and store data related to the health of the battery; Monitoring devices for monitoring battery performance characteristics; Testing and measuring equipment for use in testing the performance and efficiency of power plant equipment