This document discusses the key components of a computer system including hardware, programs, data, and people. It then describes different levels of data organization from the bit and byte level up to databases. It lists some common database management systems like dBASE, Microsoft Access, Microsoft SQL Server, Oracle, and FoxPro. It also briefly mentions data definition languages, data manipulation languages, and the database concept of normalization.

3. .

5. (Hardware)
(Program)
(Data)
(People)
-
-
-
-
-
(Procedures)

6. (Bit)
(Byte) (Character)
(Field)
(Record)
(Files)
(Database)

8. ( Data Defintion : DDL
)
( Data
Mainpopula Langquage )
( Data Control
Langquage )

11. Table

20. Table
Normalization

21. dBASE
Microsoft Access
Microsoft SQL Server
Oracle
FoxPro