System Clock
One of the fundamental concepts behind discrete time is an implied (actual or hypothetical) system clock. If one wishes, one might imagine some atomic clock to be the de facto system clock.
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Famous quotes containing the word system:
“I confidently predict the collapse of capitalism and the beginning of history. Something will go wrong in the machinery that converts money into money, the banking system will collapse totally, and we will be left having to barter to stay alive. Those who can dig in their garden will have a better chance than the rest. I’ll be all right; I’ve got a few veg.”
—Margaret Drabble (b. 1939)