Saab is upgrading the vessels' combat and fire control systems to 9lv Mk4, the fourth generation naval command and control system.

China will start building its first large nuclear-power reactor with home-developed 'fourth generation' technology in 2012-13, a senior engineer involved in developing the system said.

Now the fifth generation belonging to the DSP products, and its fourth generation, a higher degree of system integration, DSP cores and integrated peripheral components on a single chip.