Electric and electronic video surveillance installations; Electronic switchers for audio and video signals; Computer programs for searching the contents of computers and computer networks by remote control; Computer software for accessing information directories that may be downloaded from the global computer network; Computer software for administration of computer local area networks; Computer software for administration of computer networks; Computer software for use in the encryption and decryption of digital files, including audio, video, text, binary, still images, graphics and multimedia files; Computer software for use in the safeguarding of digital files, including audio, video, text, binary, still images, graphics and multimedia files; Digital video recorders; Audio-video receivers; Building security systems comprising software and hardware for providing picture, video, alarm status, building plans, and other information to a remote station; Computer hardware and software for setting up and configuring local area networks; Computer hardware and software for setting up and configuring wide area networks; Computer network hubs, switches and routers; Computer networking hardware; Computer programs for editing images, sound and video; Interface circuits for video cameras; LAN (local area network) access points for connecting network computer users; LAN (local area network) hardware; LAN (local area network) operating software; Network access server hardware; Network access server operating software; Sound and video recording and playback machines; TV and video converters; Telecommunications and data networking hardware, namely, devices for transporting and aggregating voice, data, and video communications across multiple network infrastructures and communications protocols; Transmitters and receivers for audio and video signals for transmission over twisted pair cables; Video cameras; Video multiplexers; Video transmission apparatus; Video-telephones; WAN (wide area network) hardware; WAN (wide area network) operating software