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Apparatus for transmission of communication; Climate control systems consisting of digital thermostats for cooling equipment, and a programmable logic controller (PLC) with input and output features for temperature and humidity, which works with a remote digital read out controller; Computer network interface devices; Electric control devices for heating and energy management; Electric control panels; Electronic display interfaces; LAN (local area network) access points for connecting network computer users; LAN (local area network) computer cards for connecting portable computer devices to computer networks; LAN (local area network) hardware; LAN (local area network) operating software; Network access server hardware; Network access server operating software; Network routers; Network servers; Programmable logic controller (PLC); User interfaces for electrotechnical and electronic devices