The OCTA attribute specifies the amount of storage in  octawords
  to be received by the object.

  Syntax:

     OCTA [[( n )]]

  The optional constant  'n'  indicates  the  number  of  octaword
  storage  units.  It must denote a positive integer.  If you omit
  'n', the default value is 1.

  See the "HP Pascal Language Reference Manual" for  the  complete
  description of using the OCTA attribute.