Castle of St John the Baptist Castle of St John the Baptist The Castle of St John the Baptist ("Castillo de San Juan Bautista"), also called Black Castle ("Castillo Negro") , in the city of Santa Cruz de Tenerife in the Canary Islands of Spain, was the second most important fort in the defense of Santa Cruz de Tenerife. It is located in the heart of the capital near the Parque Marítimo César Manrique and behind the Auditorio de Tenerife. Its construction was started in 1641 and completed in 1644. It was later rebuilt in 1765 with the addition of a cylindrical tower facing the sea.
The purpose of a system is what it does be balanced by a more straightforwardly descriptive view. The term is used in many fields including biology and management. The purpose of a system is what it does The purpose of a system is what it does (POSIWID) is a systems thinking heuristic coined by Stafford Beer. Stafford Beer coined the term POSIWID and used it many times in public addresses. In his address to the University of Valladolid, Spain, in October 2001, he said "According to the cybernetician, the purpose of a system is what it does. This is a basic dictum. It stands for bald fact, which makes