Command to get all installed Terminal shells

Is there a command to get a list of all Terminal shells?
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Not a command. But you may be able to find what you are looking for at The Man Pages Apple posts for developers…
http://developer.apple.com/documentation/Darwin/Reference/ManPages/index.html#//apple_ref/doc/framework/manpages

Thanks that’s exactly what I was looking for. [control x] then release and [tab] used to give this list but it’s not working since an upgrade.
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