i could never get used to the psion 5mx keyboard. it was just a little too small. the treo thumb-board wasn't ideal, but it worked well enough. FWIW, PalmOS

i could never get used to the psion 5mx keyboard. it was just a little too small. the treo thumb-board wasn't ideal, but it worked well enough. FWIW, PalmOS was HEAVILY influenced by MacOS classic. I mean, at least they changed the variable names in the debug images.