YEKATERINBURG, December 07. /FIS/. Ural Optical and Mechanical Plant and Sukhoi Corporation signed a general agreement in Yekaterinburg. Under the agreement the parties will cooperate in three areas. The first area is the upgrading of currently used equipment and development of future prototypes of equipment of military and civil purposes. The second area concerns the development of unified information space to facilitate the cooperation of the two companies in the development of information and project technologies. The third area is interaction in the vast market of civil aeronautical engineering