Proceedings of the National Academy of Sciences of the United States of America
A less common, broader meaning of proceedings are the acts and happenings of an academic field, a learned society. For example, the title of the "Acta Crystallographica" journals is New Latin for "Proceedings in Crystallography"; the "Proceedings of the National Academy of Sciences of the United States of America" is the main journal of that academy. Scientific journals whose ISO 4 title abbreviations start with "Proc", "Acta", or "Trans" are journals of the proceedings (transactions) of a field or of an organization concerned with it, in that secondary meaning of the word.