Cited references and note

1. SPAM^® is a registered trademark of Hormel Food Corporation, referring to a family of ham-like products. The use of the word “spam” to refer to unwanted e-mail is of obscure origin, but may have something to do with a comedy sketch by the Monty Python group depicting a restaurant in which every dish contains spam.
2. M. W. Lynch, “Unlovely Spam,” Reason Online (October 1997), http://reason.com/9710/col.lynch.shtml.
3. B. Templeton, “E-Stamps,” http://www.templetons.com/brad/spume/estamps.html.
4. Some ongoing discussion of these issues may be found at a Web site maintained by the author; see http://www.cs.cmu.edu/~sef/spam-discussion.htm. The author can be reached at fahlman@us.ibm.com or at sef@cs.cmu.edu.