The Hyperlogos

At the Santa Cruz Flea Market I got, among other things, a Magellan Maestro 4050. I already have a slightly later unit, but this one has bluetooth. They run WinCE 5 which means most relevantly that they have persistent storage. WinCE 4 and earlier devices almost uniformly have only volatile memory, so when your battery runs out, your device resets itself to its factory settings. This was likely the best design decision Microsoft could have made, because WinCE 4 was an unreliable pile of debris that would corrupt its own installation at the slightest opportunity.

The HP iPAQ H2215 is a 400MHz Xscale-powered Windows Mobile PDA. It ships with Windows Mobile 2003 (Windows CE) and has an SDIO slot, a CompactFlash Type II slot, and bluetooth wireless functionality. The unit has a rotated 3.5" QVGA screen (240x320) which displays 16 bit color, and is powered by a 900 mAH Lithium-lon battery (or an optional 3600mAH battery which makes the unit quite a big larger.) All in all, this is a credible PDA, but I do wish it had WiFi.