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Cake day: June 18th, 2023

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  • The first three Macs had this jack in the front for the keyboard and a PC-like serial port in the back for the mouse. With the Mac SE and II, the switched to ADB, which looked like a PS/2 port, but you could daisy chain your mouse, keyboard, and other inputs like tablets or joysticks all into one jack in the back of the computer.



  • Early PC only had 5 card slots, and the only jack on the motherboard was the keyboard. One slot is going to be used by a video card, one’s probably being used by a hard drive controller, one’s probably used by a parallel + serial card. Soundcards also included controller ports to try to save a slot.








  • Germany didn’t choose hydrogen because of its greater lifting capacity, they had to use it because the US was the only country at the time with industrial quantities of helium, and they weren’t exporting it. The Hindenburg was originally planed to use helium, but once the Zeppelin Company resigned themselves to having to use hydrogen, they added addition passenger staterooms to take advantage of the excess lift capacity.