Token

Token can mean one of several things:

In lexical analysis, a token is an atomic element within a string. See Token (parser).
A token may also be a piece of metal or a wooden chip used as a substitute for currency.
In business or politics, a token can be a single person of a disadvantaged group hired very publicly so the organization can claim to be inclusive or representative.
On railways, a token is a physical object given to a locomotive driver to authorise him to use a particular stretch of single track. Since there is only one token for each length of track, the driver can be confident that another train will not meet him from the other direction. The token system has now largely been replaced by signals.
In computing, a token is a virtual object that is passed between computers or other devices on a network to enable them to communicate. Only the device with the token may communicate to avoid clashing with other devices - see Token ring.
In South Park, Token is the only black child on the show.

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