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  2. Sound attenuator - Wikipedia

    en.wikipedia.org/wiki/Sound_attenuator

    A sound attenuator, or duct silencer, sound trap, or muffler, is a noise control acoustical treatment of Heating Ventilating and Air-Conditioning (HVAC) ductwork designed to reduce transmission of noise through the ductwork, either from equipment into occupied spaces in a building, or between occupied spaces.

  3. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    Air conditioning, often abbreviated as A/C (US) or air con (UK), [1] is the process of removing heat from an enclosed space to achieve a more comfortable interior temperature and in some cases also controlling the humidity of internal air.

  4. Messier object - Wikipedia

    en.wikipedia.org/wiki/Messier_object

    The Messier catalogue comprises nearly all of the most spectacular examples of the five types of deep-sky object – diffuse nebulae, planetary nebulae, open clusters, globular clusters, and galaxies – visible from European latitudes. Furthermore, almost all of the Messier objects are among the closest to Earth in their respective classes ...

  5. Whole Earth Catalog - Wikipedia

    en.wikipedia.org/wiki/Whole_Earth_Catalog

    The Next Whole Earth Catalog (ISBN 0-394-70776-1) in 1980 was well received, and an updated second edition followed in 1981. The 1980s also saw two editions of the Whole Earth Software Catalog, a compendium for which Doubleday had bid $1.4 million for the trade paperback rights. [7]

  6. ANT catalog - Wikipedia

    en.wikipedia.org/wiki/ANT_catalog

    The ANT catalog [a] (or TAO catalog) is a classified product catalog by the U.S. National Security Agency (NSA) of which the version written in 2008–2009 was published by German news magazine Der Spiegel in December 2013. Forty-nine catalog pages [b] with pictures, diagrams and descriptions of espionage devices and spying software were

  7. Standard Catalog of World Paper Money - Wikipedia

    en.wikipedia.org/wiki/Standard_Catalog_of_World...

    The Standard Catalog of World Paper Money was a well-known catalogue of banknotes that was published by Krause Publications in three volumes. These catalogues are commonly known in the numismatic trade as the Pick catalogues, as the numbering system was originally compiled by Albert Pick, but are also referred to as "Krause" or "SCWPM".

  8. Creature Catalogue - Wikipedia

    en.wikipedia.org/wiki/Creature_Catalogue

    The Creature Catalogue is a supplement which presents game statistics for more than 200 monsters, most of which had been compiled from previous D&D rules set and adventure modules, as well as 80 new monsters which had never been printed before; each monster features an illustration and they are indexed by what habitat they can be encountered in. [1]

  9. Standard Catalog of World Coins - Wikipedia

    en.wikipedia.org/wiki/Standard_Catalog_of_World...

    Standard Catalog of World Crowns and Talers from 1601 to date, 1st Edition, publication date 1994, Krause Publications, ISBN 978-0-8734-1211-7; Standard Catalog of World Gold Coins: With Platinum and Palladium Issues: 1601–present, 6th Edition, publication date 2009, Krause Publications, ISBN 978-1-4402-0424-1 Digital copy available separately.