Four.
29. What are they?
Rhetorical, Etymological, for Reference, and for the Printer.
30. What is Rhetorical punctuation?
That used for rhetorical effect.
31. What is Etymological punctuation?
That used in Orthography and Orthoepy.
32. What is Reference punctuation?
That used to refer the reader to the margin of the page.
33. What is punctuation for the Printer?