Taras K. Vintsiuk. Operative System for Pattern Computer. Pattern computer (PatCom) is such intellectual cybernetic system that provides a functional simulation of intelligent, mainly subconscious activity of all living and a human being particularly. In PatCom this activity is related to image, sound and other patterns perception, scene analysis, action and movement planning, generalisation of observations, discovering of regularities, prediction, decision making etc. Pattern computer operates with patterns and other complex notions. It actualises both pattern and logical reasoning. Pattern computer is a parallel system. It has several information perception channels (acoustic, visual, scential) that is multimodal perception, pattern operation system, improved human-machine interface. Unlike usual computer, which is based on a rapid arithmetic-logical processor and a large RAM space, PatCom is grounded on external world models including physical, geometry, acustical, language, linguistic, semantical ones. Here a so-called pattern operation system for a pattern computer is debated. This system synchronizes an intellectual processing of multimodal information, which come by different perception channels, and operating by external world models fulfils a complex semantic interpretation for whole received informātion.