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This form allows you to flip virtual coins. The randomness comes from atmospheric noise, which for many purposes is better than the pseudo-random number algorithms typically used in computer programs.
It is not always easy to decide what is heads and tails on a given coin. Numismatics (the scientific study of money) defines the obverse and reverse of a coin rather than heads and tails. The obverse (principal side) of a coin typically features a symbol intended to be evocative of stately power, such as the head of a monarch or well-known state representative. In the case of coins that do not have royalty or state representatives on them, the side that features the name of the country is usually considered the obverse.
Thanks to lots of helpful people for donating coin pictures!
If you don't see your currency listed here and you have good quality coin pictures that you would like to donate, feel free to email me. (Remember that you must own the copyright to the pictures, or they must be in the public domain.)