Catalog refers to a complete list of items, typically arranged systematically with descriptive details.
Common usages include:
1. Product catalog - a list of products for sale with descriptions and prices
2. Library catalog - a database of books and other materials in a library
3. Online catalog - a digital version of a product listing
4. Catalog shopping - the practice of ordering goods from printed catalogs
5. In computing, a catalog refers to a directory of files or database entries