In 1938 – Chester Carlson, tired of the exhaustive process of hand-copying or photographing patent paperwork, decided to make an easier way. On this date he produced the first electrophotographic image. Xerox would later make it automatic, popular, and make Carlson rich.

In 1968 – The US bounced back from tragedy with the first manned mission to space, Apollo 7 safely splashing down in the Atlantic Ocean after orbiting the Earth 163 times.

In 1975 – The Soviet unmanned space mission Venera 9 landed on Venus. Pics or it didn’t happen you say? Well Venera 9 was the first spacecraft to return an image from the surface of another planet.

In 2009 – Microsoft released Windows 7. It sold really well.

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In 1879 – Thomas Edison finished up 14 months of testing with an incandescent electric light bulb that lasted 13½ hours. It improved on 50-year-old technology to make light bulbs safe and economical by using lower electricity, a carbon filament and an improved vacuum.

In 1949 – An Wang filed a patent for a magnetic ferrite core memory, that he called pulse transfer controlling devices. Two years later he formed Wang computers.

In 1983 – The seventeenth General Conference on Weights and Measures ruled the meter would be defined as the distance light travels in a vacuum in 1/299,792,458 of a second, simplifying it from the previous definition of 1,650,763.73 wavelengths of the orange-red emission line in the electromagnetic spectrum of the krypton-86 atom in a vacuum.

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In 1975 – Atari filed for a patent on the sit-down “cockpit” arcade cabinet, literally putting you inside the game. The game Hi-Way with the slogan “Hi Way — All It Needs Is Wheels”, was the first Atari game to use the cabinet. It was a first-person driver in which you had to dodge cars and… well… drive.

In 1984 – The Monterey Bay Aquarium opened in Monterey, California. It not only provided a world-class place to learn about sea life, but inspired millions of screensavers and wallpaper images.

In 2004 – Mark Shuttleworth sent out an email to Ubuntu developers announcing the first official release of the Linux-based operating system, Warty Warthog. Every six months since, a new version of Ubuntu comes out with a new alliterative animal-inspired name.

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In 1832 – Samuel Morse first conceived of the electric telegraph system. At least he said later this was the day he first thought of it.

In 1941 – The Smith-Putnam Wind Turbine first fed AC power to the electric grid on Grandpa’s Knob in Castleton, Vermont, becoming the first wind machine to do so. The 1.25 MW turbine operated for 1100 hours before a blade failed.

In 1973 – The Atanasoff-Berry Computer finally got its due. US Federal Judge Earl R. Larson signed his decision that the ENIAC patent was invalid and named Atanasoff the inventor of the electronic digital computer. But ENIAC still incorrectly gets the credit from many to this day.

Like Tech History? Purchase Tom Merritt’s Chronology of Tech History at Merritt’s Books site.