The Apache License in the HPSF files makes reference to NCSA software that POI 
doesn't use. It must have been taken from the http://httpd.apache.org site.

cvs diff SummaryInformation.java (in directory C:\jakarta-
poi\src\java\org\apache\poi\hpsf\)
Index: SummaryInformation.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/SummaryInformation.java,v
retrieving revision 1.5
diff -r1.5 SummaryInformation.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.


cvs diff Word.java LittleEndian.java DWord.java ClassID.java Byte.java (in 
directory C:\jakarta-poi\src\java\org\apache\poi\hpsf\littleendian)
Index: Word.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/littleendian/Word.java,v
retrieving revision 1.1
diff -r1.1 Word.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.
Index: LittleEndian.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/littleendian/LittleEndian.java,v
retrieving revision 1.1
diff -r1.1 LittleEndian.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.
Index: DWord.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/littleendian/DWord.java,v
retrieving revision 1.1
diff -r1.1 DWord.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.
Index: ClassID.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/littleendian/ClassID.java,v
retrieving revision 1.1
diff -r1.1 ClassID.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.
Index: Byte.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/littleendian/Byte.java,v
retrieving revision 1.1
diff -r1.1 Byte.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.


cvs diff Variant.java Util.java UnexpectedPropertySetTypeException.java 
SummaryInformation.java SpecialPropertySet.java Section.java 
PropertySetFactory.java PropertySet.java Property.java 
NoSingleSectionException.java NoPropertySetStreamException.java 
MarkUnsupportedException.java HPSFRuntimeException.java HPSFException.java 
DocumentSummaryInformation.java (in directory C:\jakarta-
poi\src\java\org\apache\poi\hpsf\)
Index: Variant.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/Variant.java,v
retrieving revision 1.1
diff -r1.1 Variant.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.
Index: Util.java
===================================================================
RCS file: /home/cvspublic/jakarta-poi/src/java/org/apache/poi/hpsf/Util.java,v
retrieving revision 1.1
diff -r1.1 Util.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.
Index: UnexpectedPropertySetTypeException.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/UnexpectedPropertySetTypeException.java,v
retrieving revision 1.1
diff -r1.1 UnexpectedPropertySetTypeException.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.
Index: SummaryInformation.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/SummaryInformation.java,v
retrieving revision 1.5
diff -r1.5 SummaryInformation.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.
Index: SpecialPropertySet.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/SpecialPropertySet.java,v
retrieving revision 1.1
diff -r1.1 SpecialPropertySet.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.
Index: Section.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/Section.java,v
retrieving revision 1.1
diff -r1.1 Section.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.
Index: PropertySetFactory.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/PropertySetFactory.java,v
retrieving revision 1.1
diff -r1.1 PropertySetFactory.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.
Index: PropertySet.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/PropertySet.java,v
retrieving revision 1.1
diff -r1.1 PropertySet.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.
Index: Property.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/Property.java,v
retrieving revision 1.1
diff -r1.1 Property.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.
Index: NoSingleSectionException.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/NoSingleSectionException.java,v
retrieving revision 1.1
diff -r1.1 NoSingleSectionException.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.
Index: NoPropertySetStreamException.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/NoPropertySetStreamException.java,v
retrieving revision 1.1
diff -r1.1 NoPropertySetStreamException.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.
Index: MarkUnsupportedException.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/MarkUnsupportedException.java,v
retrieving revision 1.1
diff -r1.1 MarkUnsupportedException.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.
Index: HPSFRuntimeException.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/HPSFRuntimeException.java,v
retrieving revision 1.1
diff -r1.1 HPSFRuntimeException.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.
Index: HPSFException.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/HPSFException.java,v
retrieving revision 1.1
diff -r1.1 HPSFException.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.
Index: DocumentSummaryInformation.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/DocumentSummaryInformation.java,v
retrieving revision 1.1
diff -r1.1 DocumentSummaryInformation.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.


cvs diff SectionIDMap.java PropertyIDMap.java (in directory C:\jakarta-
poi\src\java\org\apache\poi\hpsf\wellknown\)
Index: SectionIDMap.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/wellknown/SectionIDMap.java,v
retrieving revision 1.1
diff -r1.1 SectionIDMap.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.
Index: PropertyIDMap.java
===================================================================
RCS file: /home/cvspublic/jakarta-
poi/src/java/org/apache/poi/hpsf/wellknown/PropertyIDMap.java,v
retrieving revision 1.1
diff -r1.1 PropertyIDMap.java
53,56d52
<  *
<  * Portions of this software are based upon public domain software
<  * originally written at the National Center for Supercomputing Applications,
<  * University of Illinois, Urbana-Champaign.