1) command:- CIS

Purpose :- Clear the screen

Format:-CLS

e.g. CLS

2) command:- Date

Purpose :- to display the date or change the date

Format:-date

e.g. Date

3) Command:- time

purpose:- to display the time or change the time

Format:-time

e.g.time

4) command -DIR

Purpose:- to display the contens of a route directory or subdirectory or path specifie,

                 to use to display the the contents page by page,

                 use to display the contents across the widwith of the screen,

                  use to display the contens of current directory and subdirectories.

Format:-DIR/P

               DIR/W

               DIR/S