central challenges central chamber central channel central character central characters central chile central china central chinese central church central circle central circular central cities central city central city police central clearing central clinic central coast central coastal central collection central college central colorado central column central command central commission central committee central committee member central committees central communication central community central compartment central component central components central computer central computer system central concept central concepts central concern central concerns central conductor central conference central conflict central connecticut central conservatory central console central contact point central control central control panel central control room central control system central control unit central controller central cooling central coordinating central coordination central coordinator central copenhagen central cordillera central core central corridor central council central counterparties central counterparty central court central courtyard central credit central criminal central croatia central cross central cuba central cultural central customer central customs central cylinder central cylindrical central dalmatia central darfur central data central database central de central defence central defender central defenders central defense central del central department central departments central depository central depression central design central development central dial central direction central directorate central disc central dispatch central display central distribution central district central district of botswana