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21Mount Wilson Observatory — The 100 inch (2,500 mm) Hooker telescope that Edwin Hubble used to discover the general expansion of the universe …
22photoreception — photoreceptive, adj. /foh toh ri sep sheuhn/, n. the physiological perception of light. [1905 10; PHOTO + RECEPTION] * * * Biological responses to stimulation by light, most often referring to the mechanism of vision. In one celled organisms such …
23Threading (manufacturing) — Threading is the process of creating a screw thread. More screw threads are produced each year than any other machine element.[1] There are many methods of generating threads, including subtractive methods (many kinds of thread cutting and… …
24DVD — This article is about the storage media format. For the binocular vision condition, see Dissociated vertical deviation. DVD DVD R read/write side Media type Optical disc …
25CD-R — Compact Disc Recordable (CD R) logo/trademark Optical discs …
26FN Minimi — Infobox Weapon name=Minimi caption=An early M249 version of the Minimi origin=flag|Belgium type=Light machine gun is ranged=yes service= used by=See Users wars= designer=Ernest Vervier design date=1974 manufacturer=FN Herstal unit cost=… …
27Hi-MD — In January 2004, Sony announced the Hi MD media storage format as a further development of the MiniDisc Format. [ [http://news.sel.sony.com/en/press room/consumer/portable audio/walkman players/release/8720.html Sony Introduces Hi MD press… …
28information processing — Acquisition, recording, organization, retrieval, display, and dissemination of information. Today the term usually refers to computer based operations. Information processing consists of locating and capturing information, using software to… …
2935 mm film — is the basic film gauge most commonly used for both still photography and motion pictures, and remains relatively unchanged since its introduction in 1892 by William Dickson and Thomas Edison, using film stock supplied by George Eastman. The… …
30number game — Introduction any of various puzzles and games that involve aspects of mathematics. Mathematical recreations comprise puzzles and games that vary from naive amusements to sophisticated problems, some of which have never been solved.… …
