Electrical and electronic equipment, namely, telephone extension line, wire, and cable; electrical wire concentrator; computer electrical wire connector; electrical wire with electric plug; antennas; electric switches; electrical receptacles; oscillator, namely, an electrical device which can be move repeatedly from one position to another; optical filters; impulse generator, namely, an electrical device which can produce a short electrical signal that is sent along a electrical wire or through air; modems; signal converter; digital/analog converter; analog/digital converter; encoders; decoders, namely, an electrical device which can change a message that has been written or spoken in a code into ordinary language; electric coils; electric plugs; electric outlet covers; computer terminals; electrical transformers; electrical rectifiers, namely, a device which can change or correct something is wrong, undesirable or unsatisfactory; electrical connectors; circuit breakers; electrical sensors, namely, a device which reacts to certain physical conditions or impressions such as heat, light or motion; electric surge protectors; front panel of electrical switches; electric power stabilizer; electrical power supplies; uninterrupted electrical power system composed of AC/DC converters, DC/AC converters, electric switch circuits and filters; telephones; and fax machine