Rather than just cramming the Pi and a cheap LCD into his Numworks graphing calculator, [Zardam] integrated it into the device so well that you’d swear it was a feature from the factory.
If you'd like a handheld computer that'll make you look like a math nerd from 30 years ago, you're in luck. Linux DIY computer maker ClockworkPi has released a new handheld kit called the PicoCalc.