In 1675 – Gottfried Leibniz demonstrated integral calculus for the first time to find the area under the graph of good ol y=f(x). That is, if you believe what he wrote in his notebooks.

In 1930 – Albert Einstein, yes that Albert Einstein and Leo Szilard received a US patent for a refrigerator that required no electricity, just a heat source. Electrolux bought up the patents.

In 2006 – The Sony PS3 went on sale with a built-in Blu-ray player and hard drive.

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In 1983 – Fred Cohen demonstrated a way to insert code into a Unix command in order to gain control of systems. His academic adviser, Len Adelman (the A in RSA) compared the self-replicating code to a virus. It wasn’t the first code of it’s kind, but it’s the one that inspired the name.

In 1983 – At the plaza hotel in New York, Bill Gates announced Windows. It originally was called Interface Manager until Rowland Hanson convinced Gates to change the name. It would take two years before Microsoft would put it on sale.

In 2001 – The first Apple iPod went on sale. Analysts agreed that the price of $399 was too high, and Apple was too inexperienced in consumer electronics to make it a success.

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In 1967 – NASA launched a Saturn V rocket carrying Apollo 4, a test craft launched from Cape Kennedy. It was the first launch in the Apollo program and the first time using the Launch Control Center at Kennedy Space Center.

In 1979 – The NORAD computers detected a massive Soviet Nuclear Strike. Thankfully raw data from satellites were reviewed along with early warning radar, proving it was a false alarm. A technician had loaded a test tape but failed to switch the system status to “test”. Oops!

In 2004 – The Mozilla Foundation released Firefox 1.0. It featured tabbed browsing and a popup blocker.

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In 1870 – The US Weather Bureau (someday to become the National Weather Service) issued its first weather warning for a storm on the Great Lakes. It was accurate, but there was no high-pitched beep yet.

1887 – German immigrant Emile Berliner patented a successful system of sound recording that used flat disks instead of cylinders. The first versions were made of glass. Talk about your broken records.

In 1895 – German physicist Wilhelm Roentgen, working in his lab in Wurzburg noticed a strange effect while studying vacuum tubes covered in black cardboard. He eventually saw his own skeleton and went on to publish a paper “On a new kind of rays.” The rays would end up being called X-Rays.

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