BeOS and Haiku not only used MIME types but they also use the magic number approach to add a MIME type to a file if they only got the raw file. Also unless I r

BeOS and Haiku not only used MIME types but they also use the magic number approach to add a MIME type to a file if they only got the raw file. Also unless I read the docs wrong SmallTalk added MIME types for creator/editor/viewer to a file. So you could find what created a file but could tell the OS to use a different program to edit the file and even still another program to just view the contents. Please correct me if I am wrong.