For those who get most of their work done on the go, a handheld can stand in for a full-fledged laptop in many situations. In this category, connectivity, battery life, and size are key factors.

There was a time — not so long ago — when a handheld terminal would have been an expensive and exotic piece of kit. Now, all it takes is a Raspberry Pi and an off-the-shelf TFT display, as [ZitaoTech] ...