Extensions Application name or files Extensions Notepad or text file .txt WordPad or Rich text format .rtf Sound .mp3, .wav Video .3gp, .mp4, .avi, .mkv, .wmv, .vob, .mpeg MS Word 2003 and older version (.doc) 2007 and newest version (.docx) MS Excel 2003 and older version (.xls) 2007 and newest version (.xlsx) MS PowerPoint 2003 and older version (.ppt) 2007 and newest version (.pptx) MS Access .accdb Executive file or setup file for windows of .exe, .msi
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