A few years ago the grocery I worked for got rid of their inventory scan guns that ran on Windows CE and used TinyTERM. They were rugged as shit and it was impossible to lose your progress if you took the scanner into a WiFi dead zone somewhere in the bowels of the stockroom. Then at some point they switched to these shitty Android-based ones where everything is done on a web browser. You needed to be extra cautious to make sure it was actually communicating with the WiFi and remote server, or else whatever you're scanning would not get counted/ordered.