Figurative constants name and refer to specific constant values
  generated by the compiler.  The singular and plural forms of figurative
  constants are equivalent and interchangeable.  The figurative constants
  supported by HP COBOL are ZERO, ZEROS, ZEROES, SPACE, SPACES,
  HIGH-VALUE, HIGH-VALUES, LOW-VALUE, LOW-VALUES, QUOTE, QUOTES, ALL
  literal, and symbolic-character.