1. 522 is a 10-digit code used to identify specific categories of books, primarily in library catalogs, that are made up of youth materials such as books, movies, magazines, and other media.
2. 52 is a series of codes that differentiate further within the 522 categories. This means that once an item is identified as 522, then it can be broken down into more specific topics based on the 52 codes.
3. 522 covers items for babies, toddlers, ages 0-4, and primary age 5-12.
4. 52 covers topics such as Human Interactions, School Activities, Interests & Hobbies, Health & Safety, Nature & Environment, and Historical & Cultural.
5. Items in these categories can include books, audiobooks, ebooks, video games, movies, music, and more.