Back in the 1990s, I was right into the whole pocket computer thing - I even had a blog called The PDA Guy and I got my start as a writer reviewing products like the HP 320LX (which I was able to upgrade from Windows CE 1 to version 2 by installing a new hardware ROM). But the grand-daddy of the pocket computer was the Psion. Now, after an absence of almost two decades the Psion is reborn.