If the paper uses technical terms, unusual abbreviations, or common words in an unusual way, it can be a good idea to have a Glossary and/or an Abbreviation list. Typically these lists are presented before, or as a part of, the Introduction or Background. A Glossary or Abbreviation list could also occur in a Methods section if the jargon or abbreviations have to do only with methods, and therefore these words are encountered only in the Methods and/or Materials sections. In publications, a Glossary or Abbreviation list sometimes occurs at the end of a paper, as an Appendix.