The U.S. National Academies Committee on International Security and Arms Control (CISAC) and the Chinese Scientists Group on Arms Control (CSGAC) of the Chinese People's Association for Peace and Disarmament have jointly produced a Chinese - English English - Chinese Nuclear Security Glossary. This glossary of approximately 1000 terms is built on 20 years of joint discussions on nuclear arms control, nuclear nonproliferation, nuclear energy, and regional security issues and is intended to remove barriers to progress in exchanges and diplomatic, cooperative, or other activities where unambiguous understanding is essential.