Categories: Disambiguation Theology is literally rational discourse concerning God (Greek θεος, theos, God, + λογος, logos, rational discourse). By extension, it also refers to the study of other religious topics. ... Emanuel Swedenborg, 75, holding the manuscript of Apocalypsis Revelata (1766). ... In theology, correspondence is a term to refer to the relationship between spiritual and natural realities, or between mental and physical realities. ... History Main article: History of mathematics In addition to recognizing how to count concrete objects, prehistoric peoples also recognized how to count abstract quantities, like time -- days, seasons, years. ... Economics (deriving from the Greek words οίκω [oeko], house, and νέμω [nemo], distribute) is the social science that studies the allocation of scarce resources through measurable variables. ... In mathematics and mathematical economics, correspondence is a term with several related but not identical meanings. ... Broadly conceived, linguistics is the study of human language, and a linguist is someone who engages in this study. ... The comparative method (in linguistics) is a method used to detect genetic relationships between languages and to establish a consistent relationship hypothesis by reconstructing: the common ancestor of the languages in question, a plausible sequence of regular changes by which the historically known languages can be derived from that common... Communication is the process of exchanging information usually via a common system of symbols. ... This article is about letter, a written message from one party to another. ... Though anyone who creates a written work may be called a writer, the term is usually reserved for those who write creatively or professionally, or those who have written in many different forms. ... A British pillar box The postal system is a system by which written documents typically enclosed in envelopes, and also small packages containing other matter, are delivered to destinations around the world. ... The correspondence theory of truth is the theory that something is rendered true by the existence of a fact with corresponding elements and a similar structure. ... Epistemology, from the Greek words episteme (knowledge) and logos (word/speech) is the branch of philosophy that deals with the nature, origin and scope of knowledge. ...