Autotransformers; Batteries; Modems; Multiplexors; Rectifiers; AC/DC converters; Accumulators and batteries; Accumulators; Automatic transfer switches; Battery chargers; Battery monitors; Computer apparatus, namely, a converter that superimposes an Ethernet signal on an existing cable; Computer network bridges; Computer network switches; Current converters; DC/AC power converters; Distribution boxes for electrical power; Downloadable computer operating system software; Electric accumulators; ...