Letters and punctuation that Dragon Dictate can type for you in Dictation mode are also listed in the Vocabulary Editor window. The list here in the online help, however, arranges information about symbols by category, shows you the names that you need to use in order to dictate each symbol, and adds information about Spelling mode symbols (which are not listed in the Vocabulary Editor window).
Letters that you can say in Dictation mode.
Letters and numerals that you can say in Spelling mode.
Punctuation that you can say in Dictation mode or Spelling mode.