![Tube Time on X: "quick reminder: the original IBM PC (5150) had a built-in cassette port. nobody really used it, so it was basically just a way to damage a keyboard by Tube Time on X: "quick reminder: the original IBM PC (5150) had a built-in cassette port. nobody really used it, so it was basically just a way to damage a keyboard by](https://pbs.twimg.com/media/Dcjb8lFVwAAtzLs.jpg:large)
Tube Time on X: "quick reminder: the original IBM PC (5150) had a built-in cassette port. nobody really used it, so it was basically just a way to damage a keyboard by
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![foone🏳️⚧️ on X: "In 1987 IBM introduced the PS/2 series of computers. For keyboards, they just shrunk the existing AT keyboard connector to a new form factor, but for mice it's a foone🏳️⚧️ on X: "In 1987 IBM introduced the PS/2 series of computers. For keyboards, they just shrunk the existing AT keyboard connector to a new form factor, but for mice it's a](https://pbs.twimg.com/media/ECWM7InU4AI8f7P.jpg)
foone🏳️⚧️ on X: "In 1987 IBM introduced the PS/2 series of computers. For keyboards, they just shrunk the existing AT keyboard connector to a new form factor, but for mice it's a
![Guide to Ports and Plugs (Keyboard and Mouse Interfaces) - part of the Guide to Ergonomics by ErgoCanada.com Guide to Ports and Plugs (Keyboard and Mouse Interfaces) - part of the Guide to Ergonomics by ErgoCanada.com](https://ergocanada.com/ergo/tips/USBplug.jpg)