•More
programs manipulate data than do arithmetic
–Library
catalog manages a collection of books
–Registrar
maintains a database of student records
–EStore
has list of Items in Warehouse and in ShoppingCart
–Bank
deals with a list of BankAccounts
–Screen
manages a set of pixels
–Windows
folder holds files (and other folders)
•…
list, set, database, group, collection, container ...