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PCS v2.21   released on 12.03.2002  :
  * Production changes for modules produced from 12. 2001

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PCS v2.2  released on 16.03.2001 :
  * files and directory history available in Load, Save, Convert panels
  * .sdt and .set files are now registered types -
           - loading the file by doubleclick  on it and drag-and-drop possible
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