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Duplicating machines were the predecessors of modern document-reproduction technology. They have now been replaced by digital duplicators, scanners, laser printers and photocopiers, but for many years they were the primary means of reproducing documents for limited-run distribution. The duplicator was pioneered by Thomas Edison and David ...
The Archive is a 501 (c) (3) nonprofit operating in the United States. In 2019, it had an annual budget of $37 million, derived from revenue from its Web crawling services, various partnerships, grants, donations, and the Kahle-Austin Foundation. [ 42 ] The Internet Archive also manages periodic funding campaigns.
A mimeograph machine (often abbreviated to mimeo, sometimes called a stencil duplicator or stencil machine) was a low-cost duplicating machine that worked by forcing ink through a stencil onto paper. [1] The process was called mimeography, and a copy made by the process was a mimeograph. Mimeographs, along with spirit duplicators and ...
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An engraving of Robert Fludd 's 1618 "water screw" perpetual motion machine. The history of perpetual motion machines dates at least back to the Middle Ages. For millennia, it was not clear whether perpetual motion devices were possible or not, but modern theories of thermodynamics have shown that they are impossible.
To do so technically would require a more sophisticated grammar, like a Chomsky Type 1 grammar, also termed a context-sensitive grammar. However, parser generators for context-free grammars often support the ability for user-written code to introduce limited amounts of context-sensitivity. (For example, upon encountering a variable declaration ...
Vimeo, Inc. (/ ˈvɪmioʊ /) [3] is an American video hosting, sharing, services provider, and broadcaster headquartered in New York City. Vimeo focuses on the delivery of high-definition video across a range of devices. [a] Vimeo's business model is through software as a service (SaaS). They derive revenue by providing subscription plans for ...
The London Science Museum 's difference engine, the first one actually built from Babbage's design. The design has the same precision on all columns, but in calculating polynomials, the precision on the higher-order columns could be lower. A difference engine is an automatic mechanical calculator designed to tabulate polynomial functions.
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