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21Andrew Jackson Beard — (1849 1921) was an African American inventor. He was a man of many talents. In his 72 years of life, he was a farmer, carpenter, blacksmith, real estate capitalist, railroad worker, and inventor. Beard was inducted into the National Inventors… …
22Gender of connectors and fasteners — A male threaded pipe, left, and female threaded elbow. In electrical and mechanical trades and manufacturing, each half of a pair of mating connectors or fasteners is conventionally assigned the designation male or female. The female connector is …
23TRS-80 — For the Chicago based electronica group, see TRS 80 (group). TRS 80 Model I with Expansion Interface Release date August 3, 1977 (1977 08 03) …
24Novation CAT — The original Novation CAT Novation was an early modem manufacturer whose CAT series were popular in the early home computer market in the late 1970s and early 1980s, notably on the Apple II. The Hayes Smartmodem 300, introduced in 1981, helped… …
25List of electronics topics — Alphabetization has been neglected in some parts of this article (the b section in particular). You can help by editing it. This is a list of communications, computers, electronic circuits, fiberoptics, microelectronics, medical electronics,… …
26Flash (photography) — The furious wing action of a Hummingbird Hawk moth is frozen by flash. The flash has given the foreground more illumination than the background. See Inverse square law A flash is a device used in photography producing a flash of artificial light… …
27STS-119 — Mission insignia Mission statistics Mission name STS 119 Space shuttle Discovery …
28AMD Phenom — Phenom Production De 2007 à 2008 Fréquence du processeur 1.8 GHz à 2.6 GHz Fréquence du FSB 3,6 GT/s à 4,0& …
29Miller Platform — The Miller Platform was an innovative railroad passenger car platform of the 19th century designed to prevent the hazard of telescoping in railroad collisions. It was named for its U.S. inventor, Ezra Miller who was issued a patent for it on July …
30RGB color model — RGB redirects here. For other uses, see RGB (disambiguation). A representation of additive color mixing. Projection of primary color lights on a screen shows secondary colors where two overlap; the combination of all three of red, green, and blue …
