Escaped characters except '\A' in generated content?

At the end of Chapter 16, there is a reference to '\A' as a way to create the
equivalent of the HTML <BR> tag.  It says there is more information about this
in Chapter 12, but I cannot find anything.

Are there any other similarly escaped characters, especially something like
'\\' to allow '\A' as literal escaped content.
Andrew n marshall
  student - artist - programmer
    http://www.media-electronica.com/anm-bin/anm
      "Everyone a mentor, Everyone a pupil"