4. Data : known facts that can be recorded and that have implicit meaning
Database : the collection of data
DBMS : a collection of interrelated data and a set of programs to access those data.
Database system : software used by computers to sort, retrieve, add, delete and modify data.
DBA : an IT professional responsible for the installation, configuration, upgrading, administration, monitoring, maintenance, and security of databases in an organization.
End user : the individual who uses the product after it has been fully developed and marketed.
Metadata : data that provides information about other data.
5. hierarchical systems, network model based systems, inverted file systems and Database system.
6. Self-describing nature of a database system
Insulation between programs and data, and data abstraction
Support of multiple views of the data
Sharing of data and multiuser transaction processing