<Tr> <Td_colspan="2"> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> The colon (:) is a punctuation mark consisting of two equally sized dots centered on the same vertical line . A colon precedes an explanation or an enumeration, or list . A colon is also used with ratios, titles and subtitles of books, city and publisher in bibliographies, Biblical citations between chapter and verse, and--in American English--to separate hours and minutes, for business letter salutations and in formal letter writing . </P> <P> In Unicode, it is encoded at U + 003A: Colon . </P>

When do you use a colon for lists
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