Historical theology is a branch of theological studies that investigates the socio-historical and cultural mechanisms that give rise to theological ideas, systems, and statements. Research and method in this field focus on the relationship between theology and context as well as the major theological influences upon the figures and topics studied. Historical theologians are thus concerned with the historical development of theology. An idea (Greek: ιδέα) is the result of thinking. ... For the Macintosh operating system, which was called System up to version 7. ... Theology is reasoned discourse concerning God (Greek θεος, theos, God, + λογος, logos, word or reason). It also refers to the study of other religious topics. ...