Every month or so, someone asks where something connects to something else, such as where to plug in a cable to show a presentation through a projector, or where to hook a printer to a laptop. Luckily, the answer these days is generally the children's toy answer. It's almost always simply fitting shapes: square peg in the square hole, star-shaped peg in the star-shaped hole, and so on. Even hard drive cables are keyed by shape now, rather than requiring someone to match the red cable to pin 1. Software use may always pose problems; but at least the hardware connections are easy.
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