insulating paper
51Hemp — This article is about industrial hemp. For its psychoactive variant, see Cannabis (drug). For the biology of the plant, see Cannabis. For other uses, see Hemp (disambiguation). The variety of appearances for cannabis. Only C. sativa (left) is… …
52computer — computerlike, adj. /keuhm pyooh teuhr/, n. 1. Also called processor. an electronic device designed to accept data, perform prescribed mathematical and logical operations at high speed, and display the results of these operations. Cf. analog… …
53Chester Carlson — Chester Floyd Carlson Born February 8, 1906(1906 02 08) Seattle, Washington, United States Died September 19, 1968(1968 …
54Vulcanized fibre — The British patent for vulcanized fibre was obtained in 1859 by Thomas Taylor, an Englishman. [http://www.deldot.gov/archaeology/henderson road/pdf/chap 4 the bounty.pdf ; p 4 8.] This patent came after the introduction of celluloid… …
55Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… …
56MOSFET — Two power MOSFETs in the surface mount package D2PAK. Operating as switches, each of these components can sustain a blocking voltage of 120 volts in the OFF state, and can conduct a continuous current of 30 amperes in the ON state, dissipating up …
57Polychlorinated biphenyl — PCBs redirects here. For printed circuit boards, see printed circuit board. Labelling transformers containing PCBs …
58recycling — or materials salvage Recovery and reuse of materials from consumed products. The main motives for recycling have been the increasing scarcity and cost of natural resources (including oil, gas, coal, mineral ores, and trees) and the pollution of… …
59AkzoNobel — Akzo Nobel N.V. Type Naamloze vennootschap Traded as Euronext:  …
60Invention of radio — Great Radio Controversy redirects here. For the album by the band Tesla, see The Great Radio Controversy. Contents 1 Physics of wireless signalling 2 Theory of electromagnetism …
