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Four decades ago, three quarters would\\u2019ve gone a lot further than they do today. With that kind of loose change you could\\u2019ve picked up some milk from the grocery store, or over half a gallon of gas, or a bus ticket. But that doesn\\u2019t explain why, on one fateful day in 1986, a systems administrator at the Lawrence Berkeley National Laboratory in California made such an issue over 75 missing cents.