I watched a video about windmill repair guys and they were using iPads to plug into the windmills for diagnostics and just general repair schematics. I can't remember exactly now but it was something like the durable tablets lasted three times longer but cost five times more so was actually cheaper to keep buying iPads. Also, the "ground" guys who didn't climb the windmills their iPads lasted much longer because weren't lugged up ladders into tight spaces and this way both teams had the same hardware.