It depends on the case. If it is in pure capital letters, CNMD means China’s National Missile Defense System, and NMD, TMD, CTMD, GNMD, GTMD, RNMD, and RTMD respectively mean the United States National Missile Defense System. Theater Missile Defense, China Theater Missile Defense, UK National Missile Defense System, UK Theater Missile Defense System, Russian National Missile Defense System, Russian Theater Missile Defense. Commonly known as the Eighth Company of the Missile System (don’t criticize if you don’t like it)