diff --git a/text/README.txt b/text/README.txt
index 0fafd24..42b2ad2 100644
--- a/text/README.txt
+++ b/text/README.txt
@@ -66,3 +66,32 @@ Word Documents
   89
   >>> u'lamb' in words
   True
+
+PowerPoint Presentations
+------------------------
+
+  >>> from cybertools.text.ppt import PptTransform
+  >>> transform = PptTransform(None)
+  >>> f = open(os.path.join(testdir, 'mary.ppt'))
+  >>> result = transform(f)
+  >>> print log
+  >>> words = result.split()
+  >>> len(words)
+  102
+  >>> u'lamb' in words
+  True
+
+Excel Spreadsheets
+------------------
+
+  >>> from cybertools.text.xls import XlsTransform
+  >>> transform = XlsTransform(None)
+  >>> f = open(os.path.join(testdir, 'mary.xls'))
+  >>> result = transform(f)
+  >>> print log
+  >>> words = result.split()
+  >>> len(words)
+  89
+  >>> u'lamb' in words
+  True
+
diff --git a/text/doc.py b/text/doc.py
index 3850246..8ea895f 100644
--- a/text/doc.py
+++ b/text/doc.py
@@ -17,10 +17,9 @@
 #
 
 """
-Searchable text support for Portable Document Format (PDF) files.
+Searchable text support for MS Word (.doc) files.
 
-This uses the pdftotext command from xpdf to perform the extraction.
-interface definitions for text transformations.
+This uses the wvware command to perform the extraction.
 
 Based on code provided by zc.index and TextIndexNG3.
 
diff --git a/text/pdf.py b/text/pdf.py
index 55b30cd..41ae286 100644
--- a/text/pdf.py
+++ b/text/pdf.py
@@ -20,7 +20,6 @@
 Searchable text support for Portable Document Format (PDF) files.
 
 This uses the pdftotext command from xpdf to perform the extraction.
-interface definitions for text transformations.
 
 Based on code provided by zc.index and TextIndexNG3.
 
diff --git a/text/ppt.py b/text/ppt.py
new file mode 100644
index 0000000..706a657
--- /dev/null
+++ b/text/ppt.py
@@ -0,0 +1,48 @@
+#
+#  Copyright (c) 2007 Helmut Merz helmutm@cy55.de
+#
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 2 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software
+#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+
+"""
+Searchable text support for Portable Document Format (PDF) files.
+
+This uses the pdftotext command from xpdf to perform the extraction.
+interface definitions for text transformations.
+
+Based on code provided by zc.index and TextIndexNG3.
+
+$Id$
+"""
+
+import os, sys
+
+from cybertools.text import base
+from cybertools.text.html import htmlToText
+
+
+class PptTransform(base.BaseFileTransform):
+
+    extension = ".ppt"
+
+    def extract(self, directory, filename):
+        if not self.checkAvailable('ppthtml', 'ppthtml is not available'):
+            return u''
+        if sys.platform == 'win32':
+            html = self.execute('ppthtml "%s" 2> nul:' % filename)
+        else:
+            html = self.execute('ppthtml "%s" 2> /dev/null' % filename)
+        data = htmlToText(html)
+        return data.decode('ISO8859-15')
diff --git a/text/testfiles/mary.odp b/text/testfiles/mary.odp
new file mode 100644
index 0000000..bfb4809
Binary files /dev/null and b/text/testfiles/mary.odp differ
diff --git a/text/testfiles/mary.ods b/text/testfiles/mary.ods
new file mode 100644
index 0000000..eb5137d
Binary files /dev/null and b/text/testfiles/mary.ods differ
diff --git a/text/testfiles/mary.ppt b/text/testfiles/mary.ppt
new file mode 100644
index 0000000..ee3f01f
Binary files /dev/null and b/text/testfiles/mary.ppt differ
diff --git a/text/testfiles/mary.xls b/text/testfiles/mary.xls
new file mode 100644
index 0000000..769aded
Binary files /dev/null and b/text/testfiles/mary.xls differ
diff --git a/text/xls.py b/text/xls.py
new file mode 100644
index 0000000..31dad60
--- /dev/null
+++ b/text/xls.py
@@ -0,0 +1,45 @@
+#
+#  Copyright (c) 2007 Helmut Merz helmutm@cy55.de
+#
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 2 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software
+#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+
+"""
+Searchable text support for MS Excel (.xls) files.
+
+This uses the xls2csv command to perform the extraction.
+
+Based on code provided by zc.index and TextIndexNG3.
+
+$Id$
+"""
+
+import os, sys
+
+from cybertools.text import base
+
+
+class XlsTransform(base.BaseFileTransform):
+
+    extension = ".xls"
+
+    def extract(self, directory, filename):
+        if not self.checkAvailable('xls2csv', 'xls2csv is not available'):
+            return u''
+        if sys.platform == 'win32':
+            data = self.execute('xls2csv -d 8859-1 -q 0 "%s" 2> nul:' % filename)
+        else:
+            data = self.execute('xls2csv -d 8859-1 -q 0 "%s" 2> /dev/null' % filename)
+        return data.decode('ISO8859-1')