application/vnd.ms-excel
xlt
application/vnd.ms-excel
xls
application/vnd.ms-excel
xla
application/vnd.ms-excel
wri
application/vnd.ms-write
ppt
application/vnd.ms-powerpoint
pps
application/vnd.ms-powerpoint
pot
application/vnd.ms-powerpoint
doc
application/msword
xcf
application/octet-stream
