A COBOL program is made up of a number of different components.  These
  are listed alphabetically.

1 - clause

  A subdivision of a COBOL sentence; an ordered set of consecutive COBOL
  character-strings that specifies an attribute of an entry.

2 - contained_program

  A COBOL source program that is directly or indirectly contained in
  another COBOL source program.

3 - division

  A division is a collection of one or more sections or paragraphs.  Each
  of the four divisions consists of a division header and division body.

  A division header identifies and marks the beginning of a division.  It
  is a specific combination of reserved words followed by a separator
  period.

4 - end_of_program

  The end of a COBOL source program is indicated either by the end of
  that program's Procedure Division or by the END PROGRAM header.

  Format -

   END PROGRAM program-name

  program-name
    must contain 1 to 31 characters and follow the rules for user-defined
    words.  It must be identical to a program-name declared in a
    preceding PROGRAM-ID paragraph.

5 - paragraph

  A paragraph consists of a paragraph header or paragraph-name (depending
  on the division) followed by zero, one, or more entries (or sentences).

  A paragraph header is a reserved word followed by a separator period.
  Paragraph headers identify paragraphs in the Identification and
  Environment Divisions.

  A paragraph-name is a user-defined word followed by a separator period.
  Paragraph-names identify Procedure Division paragraphs.

6 - phrase

  An ordered set of one or more consecutive COBOL character-strings that
  forms part of a clause or procedural statement.

7 - program_organization

      identification-division
    [ environment-division ]
    [ data-division ]
    [ procedure-division ]
    [ source-program ] ...
    [ end-program-header ]

8 - section

  A section is a set of zero, one, or more paragraphs or entries (called
  a section body) that follows a section header and related section body.

  A section header identifies and marks the beginning of a section in the
  Environment, Data, and Procedure Divisions.  In the Environment and
  Data Divisions, a section header is a specific combination of reserved
  words followed by a separator period.  In the Procedure Division, a
  section header is a user-defined word followed by the word SECTION (and
  an optional segment-number).  A separator period always follows a
  section header.

9 - sentence

  A sequence of one or more statements, the last of which ends with a
  separator period.

10 - separators

  A separator delimits character-strings.  It can be one character or two
  contiguous characters.  The following characters are recognized as
  separators:

      space      ( )            quotation mark         (")
      comma      (,)            apostrophe             (')
      semicolon  (;)            pseudo-text delimiter  (==)
      period     (.)            horizontal tab
      colon      (:)            left (() or right ()) parenthesis

11 - source-program

  represents a contained (nested) COBOL source program.  It begins with
  the Identification Division, a COPY statement or a REPLACE statement.
  It ends with the END PROGRAM header or the end of the Procedure
  Division.

12 - statement

  In the Procedure Division, a syntactically valid combination of words
  and symbols that begins with a verb.

13 - word

  A character-string of not more than 31 characters that forms one of the
  following:

  function-name
    A COBOL word that names a mechanism provided to determine
    the value of a function.
  reserved word
    A COBOL word specified in the list of words that can appear in a
    COBOL program.  A reserved word cannot appear in a program as a
    user-defined word or system-name.
  system-name
    A COBOL word that has already been defined by the implementor to
    refer to the program's operating environment.
  text-word
    A character (or a sequence of characters) in a COBOL library, source
    program, pseudo-text, or dictionary that is subject to certain
    restrictions.
  user-defined word
    A COBOL word that must appear in the source program to satisfy the
    format of a clause or statement.
  verb
    A word that causes the compiler or object program to take action.