Report token

A report token (hereinafter, the Token) is a symbol, abbreviation, or acronym that a report or another document utilizes.

List

A list or lists of the Tokens is a conditional part of report's back or, rarely, but possibly, front matter; it is included if symbols, abbreviations, or acronyms appear in any other component of the report. When the List is included, it functions as a part of document's structural metadata.

The ANSI/NISO Scientific and Technical Reports standard details,

If there are numerous symbols, abbreviations, and acronyms in a report (more than five that are not readily recognized as standard in the field), or if there is a chance that readers will not understand them, a report requires a list of all symbols, abbreviations, and acronyms with an explanation of each. The list of symbols, abbreviations, and acronyms begins on a new page in print publications. (See also 6.9, Symbols, Abbreviations, and Acronyms.) Some organizations may include this section as part of the front matter to ensure that the reader is quickly aware of its existence.