My son is an engineer for a company that makes autonomous fork lifts. One month he was at a client at an aluminium smelter with the machines moving hot metal in

My son is an engineer for a company that makes autonomous fork lifts. One month he was at a client at an aluminium smelter with the machines moving hot metal ingots around; the next month he was at a client that had the machines moving pallets of food product food around a warehouse-sized freezer.