+**Coin Op** describes any [machine](/wiki/machine) requiring currency, typically a coin, for operation. These devices, from [arcade games](/wiki/arcade_game) to laundromat washers, once defined a tangible exchange for service or entertainment, a bygone era of physical interaction.
+## See also
+- [Arcade](/wiki/arcade)
+- [Vending Machine](/wiki/vending_machine)
+- [Pinball](/wiki/pinball)
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