The source code and pre-compiled binaries for the Macintosh can be found in the directory:
https://support.hdfgroup.org/HDF/HDF_Current/hqx/
The source code and pre-compiled binaries for Windows NT/95 can
be found in the directory:
https://support.hdfgroup.org/HDF/HDF_Current/zip/
For information on what is new in HDF 4.1r2, please refer to
Newsletter 30, accessible from the HDF home page, as well as from
the NCSA ftp server.