9 digital central office switching machines, packet switching machines, fiber-optic transmission machines, digital transmission machines, cable television systems, teleconferencing apparatus, laser communications apparatus, television and radio broadcast apparatus, mobile and portable radios, facsimile machines, key telephones, computer aided design/computer aided manufacturing and computer aided engineering apparatus, automated fingerprint identification apparatus, medical electronic apparatus, supervisory control apparatus for buildings, educational electronic apparatus, printing wiring boards, video cassette recorders, integrated circuit's memories, and communications software, user interface applications software and database management software