1 .doc application/msword
2 .docx application/vnd.openxmlformats-officedocument.wordprocessingml.document
3 .dotx application/vnd.openxmlformats-officedocument.wordprocessingml.template
4 .potx application/vnd.openxmlformats-officedocument.presentationml.template
5 .ppsx application/vnd.openxmlformats-officedocument.presentationml.slideshow
6 .ppt application/vnd.ms-powerpoint
7 .pptx application/vnd.openxmlformats-officedocument.presentationml.presentation
9 .sldx application/vnd.openxmlformats-officedocument.presentationml.slide
10 .xls application/vnd.ms-excel
11 .xlsx application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
12 .xltx application/vnd.openxmlformats-officedocument.spreadsheetml.template