.NET Compact Framework 3.5. Might not sound that old, but it's only supported in Visual Studio 2008. Microsoft keeps trying to kill it off, but the manufacturer I support is still shipping products using it.
I work at a downstream customer of some company like yours. They like their windows mobile 6.5 devices very nicely, thank you very much. so when 2005 rugged wall-mounted tablet-with-barcode scanner or more commonly an RFID inventory scan gun dies, they just order another one, use MDM like Avalanche to give it its network policies and programs, and next shift grabs it and are off to the races.
Using a rugged android phone is talked about and sat on, that's about it.
Using a rugged android phone is talked about and sat on, that's about it.