 It featured a module based architecture called Base System 2000 (Bassystem 2000), as an addition of the commercial OS-9 real-time operating system.The new programming language Ada was introduced in cooperation with the company Rational.After the acquisition of the Ericsson "H Division" developing a competing Combat Management System (Maril systems) January 1, 1990, several key architectural features were transferred into 9LV Mk3.