9 Scientific, checking and supervision apparatus and instruments, namely, automated process control system consisting of micro-processor based hardware and software, electric sensors and digital signal processors, computer hardware and software, communication servers, communication hubs, digital transmitters, optical data links, optical receivers, and optical transceivers for controlling network attacks in critical infrastructures, for filtering data flows in data systems, for ensuring conformity of data flow in networks systems, for maintaining complete isolation between two networks, using an hardware airlock, for responding to the functional need to feedback data to a control center, for simplifying the integration within an existing system without increasing management workload, and for ensuring computer networks security; apparatus for recording, transmission and reproduction of sound and images; blank digital storage media; USB computer security key; computers, data processing equipment, namely, computers, computer peripherals, computer network bridges, microprocessors, and electronic modules, all for controlling network attacks in critical infrastructures, for filtering data flows in data systems, for ensuring conformity of data flow in networks systems, for maintaining complete isolation between two networks, using an hardware airlock, for responding to the functional need to feedback data to a control center, for simplifying the integration within an existing system without increasing management workload, and for ensuring computer security for electronic tablets, smartphones and electronic book readers; software, particularly software for controlling network attacks in critical infrastructures, for filtering data flows in data systems, for ensuring conformity of data flow in networks systems, for maintaining complete isolation between two networks, using an hardware airlock, for responding to the functional need to feedback data to a control center, for simplifying the integration within an existing system without increasing management workload, and for ensuring computer security; computer peripheral devices; memory cards and integrated circuit cards