Alphabetical listing, also known as indexing, is the process of arranging items in a list according to their alphabetical order. This is often used in libraries and other organizations to organize books, documents, and other materials for easy retrieval. The term 'alphabetical listing' can also refer to the arrangement of words in a dictionary or other reference book. In the context of a crossword puzzle, the term 'alphabetical listing' is used to describe the solution INDEX, which is a five-letter word.