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Day in Engineering History Archive - May 11

May 11

1st Public Demo of VisiCalc. Click here to return to the RF Cafe homepage.Day in Engineering History May 11 Archive - RF Cafe1811: Urbain-Jean-Joseph Le Verrier, who calculated the likely position of Neptune so closely that it took Johan Galle only an hour of search to find, was born. 1881: Theodore von Kármán, who designed the Bell X-1 supersonic airplane, was born. 1924: Nobel astronomer Antony Hewish, the discoverer of pulsars, was born. 1928: Radio station WGY, in Schenectady, NY, began America's first regularly scheduled TV broadcasts. 1934: The Dust Bowl began with strong winds stripping topsoil off of farm fields in the Great Plains. 1946: Dr. Robert Jarvik, inventor of the first artificial heart intended as a permanent replacement (and married to super genius IQ Marilyn vos Savant), was born. 1951: Jay Forrester filed a patent application for the matrix core memory. 1979: The VisiCalc spreadsheet program was announced. 1997: IBM's Deep Blue supercomputer defeated Garry Kasparov, becoming the first computer to beat a world-champion chess player. 1998: A French mint produced the first coins of Europe's single currency: the Euro.

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Note: These historical tidbits have been collected from various sources, mostly on the Internet. As detailed in this article, there is a lot of wrong information that is repeated hundreds of times because most websites do not validate with authoritative sources. On RF Cafe, events with hyperlinks have been verified. Many years ago, I began commemorating the birthdays of notable people and events with special RF Cafe logos. Where available, I like to use images from postage stamps from the country where the person or event occurred. Images used in the logos are often from open source websites like Wikipedia, and are specifically credited with a hyperlink back to the source where possible. Fair Use laws permit small samples of copyrighted content.

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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

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