1 BUILD
Builds one large file from many input files while inserting
'C$$$FILE  DBx:FILENM.EXT' cards to logically separate the
large file

      $ MCR BUILD
      PLEASE ENTER NAME OF FILE CONTAINING FILE-NAMES
       (NAME.EXT) WILL SUFFICE---  filespec1

             ENTER NAME OF FILE TO BE CREATED (NAME.EXT)--- filespec2

where filespec1 contains the names of the input files and
filespec2 is the name of the large file to be created.
