gold,do you know its other uses?

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for many years gold has been known to be used mainly for jewelry purposes especially for the women folks.i came across an information that surprised me about gold and the following are my findings on other uses. gold is used in food packaging it is used in the equipment tha is used to ensure that packaged foods and vegetables dont go rotten,it is also the best reflector of infrared energy which is used to dry paints on cars,it forms the part of the circuits ,so each time you click a key on your keyboardit srikes gold circuits which make the keys to respond by passing the information.it is also used in the trigger in airbags in cars..doe sanyone know of other uses of gold?