Robert's Rules of Order by Henry M. Robert (1837 - 1923)

Originally written in 1876 by Major Henry M. Robert of the US Army Corps of Engineers, Robert's Rules of Order is the most widely used authority in the United States today for "parliamentary law, based...upon the rules and practice of Congress" for "organizing and conducting the business of societies, conventions, and other deliberative assemblies." (Summary by TriciaG and from Preface)