T31os 19:00, 25 May 2010 (UTC)
This is a list of the currently supported mime types in WordPress, taken from Trunk at the time of writing.
NOTE: This is not how they are stored, the arrays and formatting are simply to make the the list easier to read.
[image-types] => Array ( [jpg|jpeg|jpe] => image/jpeg [gif] => image/gif [png] => image/png [bmp] => image/bmp [tif|tiff] => image/tiff [ico] => image/x-icon ) [video-types] => Array ( [asf|asx|wax|wmv|wmx] => video/asf [avi] => video/avi [divx] => video/divx [flv] => video/x-flv [mov|qt] => video/quicktime [mpeg|mpg|mpe] => video/mpeg [mp4|m4v] => video/mp4 [ogv] => video/ogg [mkv] => video/x-matroska ) [text-types] => Array ( [txt|asc|c|cc|h] => text/plain [csv] => text/csv [tsv] => text/tab-separated-values [rtx] => text/richtext [css] => text/css [htm|html] => text/html ) [audio-types] => Array ( [mp3|m4a|m4b] => audio/mpeg [ra|ram] => audio/x-realaudio [wav] => audio/wav [ogg|oga] => audio/ogg [mid|midi] => audio/midi [wma] => audio/wma [mka] => audio/x-matroska ) [application-types] => Array ( [rtf] => application/rtf [js] => application/javascript [pdf] => application/pdf [doc|docx] => application/msword [pot|pps|ppt|pptx|ppam|pptm|sldm|ppsm|potm] => application/vnd.ms-powerpoint [wri] => application/vnd.ms-write [xla|xls|xlsx|xlt|xlw|xlam|xlsb|xlsm|xltm] => application/vnd.ms-excel [mdb] => application/vnd.ms-access [mpp] => application/vnd.ms-project [docm|dotm] => application/vnd.ms-word [pptx|sldx|ppsx|potx] => application/vnd.openxmlformats-officedocument.presentationml [xlsx|xltx] => application/vnd.openxmlformats-officedocument.spreadsheetml [docx|dotx] => application/vnd.openxmlformats-officedocument.wordprocessingml [onetoc|onetoc2|onetmp|onepkg] => application/onenote [swf] => application/x-shockwave-flash [class] => application/java [tar] => application/x-tar [zip] => application/zip [gz|gzip] => application/x-gzip [exe] => application/x-msdownload [odt] => application/vnd.oasis.opendocument.text [odp] => application/vnd.oasis.opendocument.presentation [ods] => application/vnd.oasis.opendocument.spreadsheet [odg] => application/vnd.oasis.opendocument.graphics [odc] => application/vnd.oasis.opendocument.chart [odb] => application/vnd.oasis.opendocument.database [odf] => application/vnd.oasis.opendocument.formula [wp|wpd] => application/wordperfect )