Originally Posted by last island

Because CON is a reserved word originally used with the DOS Mode command

eg if you start up a DOS window via typing command in the START > RUN window

And click on the button to full screen you can then type:

mode con cols=40 to make the width of the screen only 40 characters instead of the normal 80

mode con lines=50 to make the screen display 50 lines of text instead of the normal 25

mode con cols=80 lines=25 will get it back to normal

The CON refers to console.