1. 
   HDF
   acronym: hierarchical data format
   Found op http://cdiac.ornl.gov/pns/acronyms.html#H
   
   
2. 
   HDF
   abbreviation: High Frequency Direction Finder
   Found op http://www.apscharts.com/abbrev.html
   
   
3. 
   HDF
   Hierarchical Data Format [NCSA]
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
4. 
   HDF
   Hereditary Disease Foundation
   Found op http://www.encyclo.co.uk/local/20895
   
   
5. 
   HDF
   Hierarchical Data Format
   Found op http://foldoc.org/HDF
   
   
6. 
   hdf
   1) Hierarchical data format
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/hdf/1
   
   

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