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Blackboard (other)
A blackboard is a reusable writing surface. Blackboard may also refer to: * Black board (Soviet policy), sign used in the Soviet era publicly to chastise farms or factories for such things as failing to meet targets or opposing collectivisation * Blackboard bold, a style of typeface often used for certain symbols in mathematics and physics texts * Blackboard Inc., an e-learning software company ** Blackboard Learn, a course management system by Blackboard Inc. * Blackboard system, an artificial intelligence approach to problem-solving, either a specific architecture or an application * Blackboard (design pattern), in software engineering * ''Blackboards'' (2000), an Iranian film See also * * * Chalkboard (other) * Blackbaud, a software company supplying nonprofit organizations {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blackboard
A blackboard (also known as a chalkboard) is a reusable writing surface on which text or drawings are made with sticks of calcium sulphate or calcium carbonate, known, when used for this purpose, as chalk. Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone. Design A blackboard can simply be a board painted with a dark matte paint (usually black, occasionally dark green). Matte black plastic sign material (known as closed-cell PVC foamboard) is also used to create custom chalkboard art. Blackboards on an A-frame are used by restaurants and bars to advertise daily specials. A more modern variation consists of a coiled sheet of plastic drawn across two parallel rollers, which can be scrolled to create additional writing space while saving what has been written. The highest grade blackboards are made of a rougher version porcelain enamelled steel (black, green, blue or sometimes other colours). Porcelain is very hard wearing, and blackboar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
