Tango has lots of applications ranging from the serious to the frivolous; from the essentially bug-free to cases which are only illustrative due to implementation problems.
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Tango has a well defined API which allows diverse applications to be ported to it.
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For instance, the current release of Tango sports three versions of chat.
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Each of these can be invoked any number of times.
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They have different tradeoffs from the serious dull text only version to the cool 2.5D graphical version which is cool (to a K-12 audience) but perhaps not the most efficient (to our busy executive)
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