a:6:{s:18:"application/msword";s:14:"Microsoft Word";s:13:"text/richtext";s:22:"Microsoft RichText RTF";s:21:"application/x-msexcel";s:15:"Microsoft Excel";s:9:"text/html";s:4:"HTML";s:10:"text/plain";s:7:"Notepad";s:15:"application/pdf";s:13:"Adobe Acrobat";}