<li>Centuries are to be styled “twentieth century”.</li>
<li>Acronyms composed of initials shall omit periods—thus USA, FAS, PhD.(Exception: The P.E.D.I.G.R.E.E. program shall not omit periods or add spaces.)</li>
<li>Endnotes are preferred to footnotes. The exception is mention of prior publication, non-Society copyright, mention of prior articles in a series, and brief author bios which go in footnotes on the first page of the article marked with an asterisk and such.</li>