A database application is a computer program whose primary purpose is entering and retrieving information from a computerized database. Early examples of database applications were accounting systems and airline reservations systems, such as SABRE, developed starting in 1957. Advantages 1. Reduced data redundancy 2. Reduced updating errors and increased consistency 3. Greater data integrity and independence from applications programs Improved data access to users through use of host and query languages 4. Improved data security 5. Reduced data entry, storage, and retrieval costs 6. Facilitated development of new applications program.