The CALL statement transfers control to another program in the executable
  image.

  Format -

  CALL prog-name

     [     {{{ [BY REFERENCE] }        }} [{{BY REFERENCE }        }]     ]
     [     {{{ BY CONTENT     }        }} [{{BY CONTENT   }        }]     ]
     [USING{{{ BY DESCRIPTOR  }{arg}...}} [{{BY DESCRIPTOR}{arg}...}] ... ]
     [     {{{ BY VALUE       }        }} [{{BY VALUE     }        }]     ]
     [     { OMITTED                    } [ OMITTED                 ]     ]

     [ GIVING function-res ]

     { [ ON EXCEPTION stment ] [ NOT ON EXCEPTION stment ] }
     { [ ON OVERFLOW stment  ] [ NOT ON OVERFLOW stment  ] }

     [ END-CALL ]

1 - prog-name

  is a nonnumeric literal or the identifier of an alphanumeric data item.
  It is the name of the program to which control transfers.

2 - arg

  is the argument.  It identifies the data that is available to both the
  calling and called programs.  It is any data item described in the
  File Section, Working-Storage Section, or Linkage
  Section, or it is a nonnumeric literal. It must not be a
  function-identifier.

3 - function-res

  is the identifier of an elementary integer numeric data item with COMP,
  COMP-1, or COMP-2 usage and no scaling positions.  Function-res can be
  subscripted, and it can be qualified.  When control returns to the
  calling program, function-res can contain a function result.

4 - stment

  is an imperative statement.