Cassiopeia PDA - Model DT-10
Casio’s new PDA has a nice VGA (640×480) screen, but is mostly billed as being ruggedized ie shock resistant, drip-proof and dustproof.

While the DT-10’s degree of ruggedness is not up to MIL-STD-810F standards, conformity to IP54 is not bad for business use.
Oh, it also has a 416MHz processor, Windows Mobile 2003 SE, Bluetooth, Wi-Fi etc, and we will probably never see it on this side of the ocean.