PCMCIA was such a cool expansion slot, but not because of that mouse monstrosity. :) From NICs and modems, to memory cards and hard drives—it was incredibly ve

PCMCIA was such a cool expansion slot, but not because of that mouse monstrosity. :) From NICs and modems, to memory cards and hard drives—it was incredibly versatile. Hot swappable too, assuming your OS supported this well. It was the USB before USB, and for a short time there were PC cards with USB ports for machines that didn't have any. Even today, I miss having an internal slot of that size, instead of a dozen different USB devices and dongles. But my favorite has got to be the Rex 3 PDA[1][2]. I've never used it, but back then it must've felt magical. [1]: https://hackaday.com/2021/03/11/rex-wasnt-really-a-pda-it-was-the-first-great-digital-rolodex/ https://hackaday.com/2021/03/11/rex-wasnt-really-a-pda-it-wa... [2]: https://www.youtube.com/watch?v=gGQNAg3TxCo https://www.youtube.com/watch?v=gGQNAg3TxCo