Acoustic receivers for telephonic communication with computers; add-in cards for micro computers; add-on-cards for computers; apparatus for data communications between computers; apparatus for linking computers; apparatus for linking computers into networks; apparatus for protecting computers from electrical power supply faults; apparatus for use in communications between computers; audiovisual display apparatus for use with computers; cabinets adapted to hold computers; cases adapted for computers; circuit boards for use with computers; circuits for computers; communications electronics for computers; component parts for computers; components for computers; computers; computers and electronic processing units); consoles for use with computers; data processing apparatus for use with computers; data recording materials for use with computers; data storage apparatus for computers; devices for converting image information to digital signals for computers; devices for use in the networking of computers; digital interactive video adaptors for use with computers; housings for computers; laptop computers; personal computers; personal computers for use with video game devices; personal home computers; portable computers; security apparatus for computers; television display apparatus for use with computers; television display monitors for use with computers; television monitors for use with computers; television receivers for use with computers; work stations (computers)