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	Block may refer to: A way of controlling train movement in railway signalling Railway signalling Railway signalling is a system used to control railway traffic safely, essentially to prevent trains from collision. Being guided by fixed rail tracks, trains are uniquely susceptible to collision; furthermore, trains cannot stop quickly, and frequently operate at speeds that do not enable them to stop within sighting distance of the driver... Postage stamp block Postage stamp block In philately, a block is a group of postage stamps still attached to each other. Blocks are of interest not only because they are rarer than individual stamps, but they also preserve relative positions of stamps as they were originally printed, information that is crucial to understanding how the stamps were produced.... , an attached group of postage stamps Objects A large concrete or stone brick Brick A brick is a block of ceramic material used in masonry construction, usually laid using mortar .... Block (sailing) Block (sailing) In sailing, a block is a single or multiple pulley. One or a number of sheaves are enclosed in an assembly between cheeks or chocks.... , a single or multiple pulley used on sailboats Cylinder block Cylinder block The cylinder block or engine block is a machined casting containing cylindrically bored holes for the pistons of a multi-cylinder reciprocating internal combustion engine, or for a similarly constructed device such as a pump.... , the main part of an internal combustion engine Toy block Toy block Toy blocks , are wooden, plastic or foam pieces of various shapes and colors that are used as building toys. Sometimes toy blocks depict Alphabet.... , one of a set of wooden or plastic pieces of various shapes Freewheel, a set of rear sprockets that attaches to a hub on the rear wheel Unit of land Block - district subdivision, a unit of government in some South Asian countries Census block Census block A census block is the smallest geographic unit used by the United States Census Bureau for tabulation of 100-percent data . Several blocks make up census block group, which again make up census tracts.... , the smallest geographical unit in the U.S. Census Bureau City block City Block City Blocks are a part of the fictional universe recounted in the Judge Dredd series that appears in the UK comic book 2000 AD .... , an area surrounded but not divided by streets Science Block (extraction of petroleum) Block (extraction of petroleum) A block in the context of extraction of petroleum, signifies a sub-division of an underground reservoir for the purpose of administering a certain production allowable.... , a sub-division of an underground reservoir Block (meteorology) Block (meteorology) Blocks in meteorology are large scale patterns in the atmospheric pressure field that are nearly stationary, effectively "blocking" or redirecting migratory cyclones.... , large-scale near-stationary patterns in the atmospheric pressure field Sports Blocking (American football) Blocking (American football) In American football, blocking is a legal move occurring when one player obstructs another player's path with his body. The purpose of blocking is to prevent defensive players tackling the ball carrier, or to protect the quarterback, in the pass, in the backfield hand-off to other backs, or when the quarterback attempts to run with the ball... , when a player obstructs another player's path Block (basketball) Block (basketball) In basketball, a block occurs when a defensive player legally deflects a shot from an offensive player. The defender must not touch the offensive player's hands or otherwise a foul is called.... , when a defensive player legally deflects a shot Blocking (martial arts), a defensive technique in the martial arts Technology Block (data storage) Block (data storage) In computing , a block is a sequence of bytes or bits, having a nominal length . Data thus structured is said to be blocked. The process of putting data into blocks is called blocking.... , the practice of storing electronic data in equally-sized units Block-level element in the HTML markup language Block (telecommunications) Block (telecommunications) In telecommunications a block is one of:* A group of bits or digits that is transmitted as a unit and that may be encoded for error-control purposes.... , a unit of data transmission Statement block Statement block In computer programming, a statement block is a section of computer code which is grouped together, much like a paragraph; such blocks consist of one, or more, statement .... , a segment of a program Block (internet) Block (internet) ----On the internet, a block is a technical measure intended to restrict access to information or resources. Blocks should not be confused with Ban , although they are often used to enforce a ban.... , technical measures to restrict users' access to certain internet resources Boom Blox Boom Blox *Boom Blox* is a puzzle video game for the Wii console, mobile game and N-Gage developed by EA Los Angeles in conjunction with film director Steven Spielberg.... , a video game for the Wii console from EA, previously known as Blocks Mathematics Block design, a kind of set system in combinatorial mathematics Block (group theory) Block (group theory) In mathematics and group theory, a block system for the group action of a group G on a Set X is a partition of X that is G-invariant.... In graph theory Glossary of graph theory Graph theory is a growing area in mathematical research, and has a large specialized vocabulary. Some authors use the same word with different meanings.... , a maximally 2-connected subgraph or a bridge with its endvertices Blocks are the elements of a block matrix Block matrix In the mathematics discipline of matrix theory, a block matrix or a partitioned matrix is a partition of a Matrix into rectangular smaller matrices called blocks.... Music Block Entertainment Block Entertainment Block Entertainment is an indie music record label created by Russell "Block" Spencer. The label is known for creating southern group Boyz N Da Hood & releasing artist Yung Joc.... , a record label Blocks Recording Club Blocks Recording Club Blocks Recording Club is a Canada co-operative of musicians, which serves as both a collaborative artist community and a record label for its member artists.... , a record label Block form musical form Musical form The term *musical form* refers to two related concepts:the type of composition the structure of a particular musical piece .There is some overlap between musical form and musical genre.... See also Blocking Blocking selfref\|For blocking on Wikipedia, please see... Bloc Bloc Bloc may refer to:Eastern Bloc, a former group of countries in EuropeBloc Qu?b?cois, a political party in Canada*Bloc Nacionalista Valenci?, a political party in Land of Valencia...