Every database has its own name up to 28 characters long. In the built-in Address Book application, one item is one address. In SuperMemo , one item is one card with a question and answer. In SuperMemo , one database can contain up to 64,000 cards. If you want to have more than 64,000 cards, you need to split them into two or more databases.
Every card belongs to one and only one category.
In the built-in Address Book example screen, you probably have categories such as Business , Personal and Unfiled . In SuperMemo , you can have separate category names within each database. In your World Geography database you can have categories such as Rivers , Cities , Capitals , US States , Mountains and Unfiled for instance. One category can contain up to 32,000 cards. Unlike the built-in Address Book and most of other applications, category names in SuperMemo can be up to 31 characters long.