Data Division:
The Data Division is a part of the COBOL program where every data item processed by the program is described.
It is very important to note that unless a data item is explained in the DATA DIVISION, it cannot be used in the procedure division.
The Data Division is divided into a number of sections like Working-storage section, File Section, Linkage section, Screen section, and Report Section. Depending on the use of the data item, it should be defined in the proper section.