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Day in Engineering History Archive - April 12

April 12

1st Flight of the Space Shuttle - RF CafeDay in Engineering History April 12 Archive - RF Cafe1852: Ferdinand von Lindemann, who first proved that π is transcendental, was born. 1892: George Blickensderfer was awarded the first U.S. patent for a portable typewriter (first laptop?). 1955: The Salk vaccine against polio was announced to work. 1961: Soviet cosmonaut Yuri Gagarin became the first man to fly in space, orbiting the Earth once before making a safe landing. 1981: The space shuttle Columbia blasted off from Cape Canaveral, FL, on its first flight (STS-1). 1984: The Telecommunications Act of 1984 received the Royal Assent, confirming the intention of the British government to privatize British Telecom. 1988: The first U.S. patent was issued for an animal life form to Harvard scientists for a genetically engineered mouse. 1994: Attorney Laurence Canter [allegedly] wrote a Perl script to flood Usenet message board readers with a notice for the "Green Card Lottery," thus creating the first incident of spamming. 2004: Barry Bonds hit his 660th home run to tie Willie Mays for third on baseball's career list.

| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |

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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Copyright: 1996 - 2024

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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 World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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