In 1936 – German computer pioneer Konrad Zuse filed for a patent for the automatic execution of calculations, and described combination memory, an early form of programmable memory. Zuse was working on what would become Germany’s first computer, the Z-1.
In 1957 – The Ryan X-13 Vertijet took off from Edwards Air Force base flew for a few minutes and landed. The significant part of the short flight was that it took off and landed vertically, becoming the first jet capable of doing so.
In 1970 – The ill-fated Apollo 13 launched from Kennedy Space Center. The second-stage inboard engine shut down early but orbital insertion was achieved. However the problems were not over.
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