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The paper presents properties of new protected microcomputer prototypes that recently developed VÚVTEngineering a.s. Žilina. The five new prototypes of protected microcomputers and displays provide users with important protection against radiated information leaking from a computer and suppress unfavorable effects of electromagnetic radiation on a man. The first part of contribution describes technical parameters of protected microcomputers and displays. The results of optical characteristics measurement and measurement of electric field radiation from the protected microcomputers are discussed in the second part of the contribution.