The VSI COBOL compiler recognizes two source program formats: ANSI and
  terminal.

1  –  ANSI format

  ANSI format conforms to the American National Standard COBOL reference
  format.  It describes COBOL programs in terms of character positions on
  an input line.  A source program line has 80 character positions:

    Margin  L         C     A          B           R
            |         |     |          |           |
            +--------------------------------------------------+
    column  |  1 - 6  |  7  |  8 - 11  |  12 - 72  |  73 - 80  |
            +--------------------------------------------------+
                 |       |       |           |           |
                 |       |    Area A      Area B     Identification Area
                 |       |
                 |  Indicator Area
                 |
             Sequence Number Area

  The compiler expects ANSI format only when the command line includes
  the /ANSI_FORMAT qualifier.

2  –  terminal_format

  The VSI COBOL terminal format shortens program preparation time and
  reduces storage space for source programs.  There is no sequence number
  or identification area, and the indicator area is combined with Area A.