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71Christmas worldwide — Christmas around the world redirects here. For other uses, see Christmas Around the World (Bradley Joseph album). The Christmas season is celebrated in different ways around the world, varying by country and region. Elements common to many areas… …
72Ceremonial use of lights — Religious services often make use of a combination of light and darkness. The ceremonial use of lights is found in the practice of many religions. Candles are extremely common and other forms of light, whether fire or other, are also used.… …
73Afghanistan — /af gan euh stan /, n. a republic in central Asia, NW of India and E of Iran. 23,738,085; 250,000 sq. mi. (647,500 sq. km). Cap.: Kabul. * * * Afghanistan Introduction Afghanistan Background: Afghanistan s recent history is characterized by war… …
74Guatemala — Guatemalan, adj., n. /gwah teuh mah leuh/; Sp. /gwah te mah lah/, n. 1. a republic in N Central America. 11,558,407; 42,042 sq. mi. (108,889 sq. km). 2. Also called Guatemala City. a city in and the capital of this republic. 917,322. * * *… …
75United Nations — 1. an international organization, with headquarters in New York City, formed to promote international peace, security, and cooperation under the terms of the charter signed by 51 founding countries in San Francisco in 1945. Abbr.: UN Cf. General… …
76Beijing 2008 Olympic Games: Mount Olympus Meets the Middle Kingdom — Introduction officially Games of the XXIX Olympiad The Games of the XXIX Olympiad, involving some 200 Olympic committees and as many as 13,000 accredited athletes competing in 28 different sports, were auspiciously scheduled to begin at 8 …
77Penny (United States coin) — Cent (Penny) United States Value 0.01 of a U.S. dollar Mass  2.5 g  (0.080 troy oz) Diameter  19.05 mm  (0.750 in) Thickness …
78Binary relation — Relation (mathematics) redirects here. For a more general notion of relation, see Finitary relation. For a more combinatorial viewpoint, see Theory of relations. In mathematics, a binary relation on a set A is a collection of ordered pairs of… …
79Identity element — In mathematics, an identity element (or neutral element) is a special type of element of a set with respect to a binary operation on that set. It leaves other elements unchanged when combined with them. This is used for groups and related… …
80Monoid — This article is about the mathematical concept. For the alien creatures in the Doctor Who adventure, see The Ark (Doctor Who). Coherence law for monoid unit In abstract algebra, a branch of mathematics, a monoid is an algebraic structure with a… …
