Naukograd , meaning "science city", is a formal term for towns with high concentrations of research and development facilities in Russia and the Soviet Union, some specifically built by the Soviet Union for these purposes. Some of the towns were secret, and were part of a larger system of closed cities in the USSR, many built by forced labor from the Soviet Gulag. In the Russian Federation in post Soviet times, the term is used generally for about seventy towns that have concentrations of scientific research and production, and specifically, refers to a small number of towns that have been recognised for their scientific capabilities and hence get special privileges.