FileInfo.com


.DD File Extension


File Type DiskDouber Archive
File Format File
Common? No
File Description Compressed file archive created by Macintosh DiskDoubler for Mac OS Classic; uses the LZ78 compression algorithm; compresses files in place on the hard drive, which are expanded on-the-fly when opened; compressed automatically in the background using AutoDoubler.

DiskDoubler was later replaced by Now Compress and Stuffit SpaceSaver; DiskDoubler is not available for Mac OS X.
Program(s) that open dd files Mac: Norton DiskDoubler Pro; SuperDoubler; DDExpand

Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/dd