Smartq V7, or its later variants R7, T7. Runs Linux (Ubuntu adaptation), Android, WinCE. Fits in a suit jacket pocket (I'm a suit wearer - my wardrobe doesn't understand the 'smart' bit of 'smart casual'...) All documentation in Chinese, but a good community exists.

... with that nice low slashdot ID. Bit of a catch for the right lady, eh?

...their last book on Fortran, Migrating to Fortran 90 , came out nearly two decades ago....

The clue's in the title, really