1902 – Joe Horn and Frank Hardart opened the first US Automat at 818 Chestnut St. in Philadelphia. The waiterless restaurant charged a nickel for most dishes.
1931 – Robert Goddard received a patent for rocket-fueled aircraft design (US. No. 1,809,271). Sadly we do not have a lot of rocket-planes in operation.
1986 – The Pittsburgh Supercomputer Center opened to support the National Science Foundation’s NSFNET, which linked five supercomputer centers. NSFNET would eventually allow commercial uses and transition to the open Internet.
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