The Psion Series 3 handhelds: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Psion_Series_3" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Psion_Series_3</a><p>A (tiny, but) usable, physical keyboard on a device that lasted _ages_, fit into a suit pocket and was eminently practical. The age of the PDA is long gone (heck, I&#x27;m typing this on an iPad mini), but we still haven&#x27;t caught up with some of its best bits.