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2. Coin dispenser - Wikipedia

   en.wikipedia.org/wiki/Coin_dispenser

   A coin dispenser. A coin dispenser (or coin changer or money changer) is a device that changes or dispenses coins. [1] It can take various forms. One type is a portable coin dispenser, invented by Jacques L. Galef, often worn on a belt, used by conductors and other professions for manual fare collection. It dispenses a single coin when a lever ...

3. Change-making problem - Wikipedia

   en.wikipedia.org/wiki/Change-making_problem

   The following is a dynamic programming implementation (with Python 3) which uses a matrix to keep track of the optimal solutions to sub-problems, and returns the minimum number of coins, or "Infinity" if there is no way to make change with the coins given. A second matrix may be used to obtain the set of coins for the optimal solution.

4. Flipism - Wikipedia

   en.wikipedia.org/wiki/Flipism

   The decision options may be either all appealing or all unpleasant, and therefore the decision-maker is unable to choose. Flipism, i.e., flipping a coin can be used to find a solution. However, the decision-maker should not decide based on the coin but instead observe their own feelings about the outcome; whether it was relieving or agonizing.

5. Coinstar - Wikipedia

   en.wikipedia.org/wiki/Coinstar

   Coinstar, LLC (formerly Outerwall, Inc.) is an American company operating coin-cashing machines.. Coinstar's focus is the conversion of loose change into paper currency, donations, and gift cards via coin counter kiosks which deduct a fee for conversion of coins to banknotes; it processes $2.7 billion worth of coins annually as of 2019. [2]

6. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

7. Coin flipping - Wikipedia

   en.wikipedia.org/wiki/Coin_flipping

   Coin flipping, coin tossing, or heads or tails is the practice of throwing a coin in the air and checking which side is showing when it lands, in order to randomly choose between two alternatives. It is a form of sortition which inherently has two possible outcomes.