diff --git a/src/main/resources/fess_label.properties b/src/main/resources/fess_label.properties
index 93a7964cb..29b47891b 100644
--- a/src/main/resources/fess_label.properties
+++ b/src/main/resources/fess_label.properties
@@ -224,10 +224,15 @@ labels.facet_contentLength_500kto1m=500kb - 1mb
 labels.facet_contentLength_1m=1mb -  
 labels.facet_filetype_title=File Type
 labels.facet_filetype_html=HTML
-labels.facet_filetype_word=Word
-labels.facet_filetype_excel=Excel
-labels.facet_filetype_powerpoint=PowerPoint
-labels.facet_filetype_pdf=PDF
+labels.facet_filetype_word=DOC (MS Word)
+labels.facet_filetype_excel=XLS (MS Excel)
+labels.facet_filetype_powerpoint=PPT (MS PowerPoint)
+labels.facet_filetype_odt=ODT (OpenDocument Text)
+labels.facet_filetype_odp=ODP (ODPresentation)
+labels.facet_filetype_pdf=PDF (Portable Document Format)
+labels.facet_filetype_pdf=FB2 (FictionBook2)
+labels.facet_filetype_pdf=EPUB (Electronic Publication)
+labels.facet_filetype_pdf=IBOOKS (Apple)
 labels.facet_filetype_others=Others
 labels.facet_label_reset=Reset
 labels.searchoptions_all=All