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The slide rule, also known colloquially as a slipstick, is a mechanical analog computer. The slide rule is used primarily for multiplication and division, and also for "scientific" functions such as roots, logarithms and trigonometry, but is not normally used for addition or subtraction. Slide rules come in a diverse range of styles and generally appear in a linear or circular form with a standardized set of markings (scales) essential to performing mathematical computations. Slide rules manufactured for specialized fields such as aviation or finance typically feature additional scales that aid in calculations common to that field. William Oughtred and others developed the slide rule in the 1600s based on the emerging work on logarithms by John Napier. Before the advent of the pocket calculator, it was the most commonly used calculation tool in science and engineering. The use of slide rules continued to grow through the 1950s and 1960s even as digital computing devices were being gradually introduced; but around 1974 the electronic scientific calculator made it largely obsolete and most suppliers exited the business. A slide rule positioned so as to multiply by 2. Each number on the D (bottom) scale is double the number above it on the C (middle) scale.From Wikipedia under the
GNU Free Documentation License  thekidsrule.com 901px x 1853px | 1800.00kB [source page] Slide Rule Front Slide Rule Slide Zoom Slide Rule Back  sphere.bc.ca 124px x 1516px | 48.10kB [source page] Click for Bigger pic click for Slide Front CLICK for Slide Back  ife.org.uk 187px x 141px | 77.50kB [source page] Foam Application Slides Rules BP have produced two slide rules for use in conjunction with Liquid Hydrocarbon Tank Fires Prevention and Response Appendix 7 Fire Fighting Equipment The slide rules are part of the From Yahoo Image Search: "Slide Rules"  stltoday.com Joe Holleman: Life Sherpa Mon, 27 Jul 2009 14:00:06 GM First, silence; then laughter just from the mention of a . slide rule. , the buggy-whip of the 21st century. (The hubbub even prompted a couple of newsroom young'uns to pause their iPods, stop Twittering and Google . slide rule. . ) ...  sliderulesports.wordpress.com sliderulesports ue, 11 Aug 2009 15:43:41 GM Slide Rule. Sports. Not just another sports blog. USA vs. El Tri. The beautiful game, what's not to love? This is the definition of a big game. Perhaps bigger for Mexico than for the US, since El Tri needs the win to secure their place ...  ephemera.typepad.com martyweil Wed, 04 Feb 2009 05:30:00 GM Mike Konshak is a world-class collector of . slide rules. and the curator of the International . Slide Rule. Museum. Mike has a lot of accomplishments to his credit, including 29 patents, but his . slide rule. collection, for obvious reasons, ... From Google Blog Search: "Slide Rules"  news.google.com Times Herald-Record Most calculations were done on a slide rule , says Cariola. He said he watched the moon landing, like everybody else, on TV, and adds that he was not certain ... news.google.com Baseball Daily Digest ... and probably has little or no idea what one is, yet he probably thinks a lot like one anyway even without the graphing calculator and slide rule . news.google.com Bradford Telegraph Argus Deacon's slide - rule conversion levelled matters and he put the Bulls ahead eight minutes later with a penalty after the Warriors were guilty of interference ... and more » From Google News Search: "Slide Rules" Is Victorian Australian Rules football on the slide? Q. Look at the Under 18 competition - WA flogged the Vics. Look at the AFL - Geelong won it last year, the first Vic based team for ages - & they only did so because of their interstate recruits. I think Vic teams will start folding - starting off with the Kangaroos in the very near future. Asked by Donkey Dick - Sun Jan 20 22:20:52 2008 - - 8 Answers - 0 Comments A. Definitely not. The Victorian sides did pretty well last year and has set back the 'slide' they may have been on back a few years. Many teams are posting record numbers of memberships for the same time in previous years, showing that the fans are getting back behind the Victorian teams. If most of the Victorians teams do well (4-5 in the top 8) then it will be the interstate sides that will have to start to worry. The Under-18 competition means nothing in the grand scheme of things. You may be forgetting that the mid last year a side of the VFL played a side of the WAFL. The VFL side come out on top to the margin of 119 points in what was a record breaking win. The Victorian teams will continue to stick around for at least the next 20… [cont.] Answered by Chalk - Mon Jan 21 06:35:52 2008 According to the Rules of FIFA, is slide tackling from behind when there is no contact with a player, a foul? Q. According to the Rules of FIFA, is slide tackling from behind when there is no contact with a player, a foul? Asked by virgilsmirgil - Wed Apr 19 06:27:44 2006 - - 4 Answers - 0 Comments A. yes as is all tackling from behind, some refs might give it though if the ball is won Answered by mrsevansinwales - Wed Apr 19 06:37:13 2006 How do I use the slide rule that sits above windows?
Q. How do I use the slide rule that sits above windows? Asked by OVD - Wed Sep 27 13:57:25 2006 - - 2 Answers - 0 Comments A. ??? I don't understand the question, nor Simon1840i's answer. At any rate, this question is in the wrong area. Answered by Balk - Wed Sep 27 14:43:53 2006 From Yahoo Answer Search: "Slide Rules" See also:
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