RFC 1521 - MIME (Multipurpose Internet Mail Extensions) says in Appendix E 
  "In order to ensure that the set of such values is
   developed in an orderly, well-specified, and public manner, MIME
   defines a registration process which uses the Internet Assigned
   Numbers Authority (IANA) as a central registry for such values."
    See ftp://venera.isi.edu/in-notes/iana
   IANA@isi.edu

See the default list in the HTTPD server below:

Proposed File Name Extension additions at Bellcore:
application/msword           doc        MS Word (Windows format) (1)
application/frame            frm        FrameMaker (2)
application/msexcel          xls        MS Excel (spreadsheet)
application/msexcel          xlc        MS Excel (chart)
application/sylk             slk        (.SYLK) Symbolic Link
                                    WingZ/Excel/Lotus (old MultiPlan format)
application/mspowerpoint     ppt        MS Powerpoint
application/superbook        xsb,sb     Superbook
application/sgml             sgm       (.SGML) Standard Generalized Markup Lang.
                                 (Future versions of Superbook should read SGML)
application/notes            ntf,nsf        Lotus Notes 

 Note: MS Project requires multiple files to run right so doesn't work
    right when referenced from a Web browser.

(1)  We recommend storing Word Docs as Word for Windows format (.doc)
     rather than Mac format (.mcw) for better portability of graphics.
(2) .fm which was used from FrameMaker 3 conflicted with .fm which
    was already used for FileMaker Pro.  Don Pratt proposed using
    .fm3 for FrameMaker 3

(Even though MS Project is a desktop standard it requires view files
to be loaded at the same time as the data and doesn't lend itself to
access from Mosaic)

application/msproject		mpp	MS Project

Other MIME types in default Mac Config. in 2.0A8 or Netscape

application/postscript  	ps 	Postscript
application/rtf 		rtf	Rich Text Format (MS Word and others)
application/macbinary		bin	(Listed as application/octet-stream)
application/mac-binhex40	hqx	(No name extension listed in HTTPD)
image/x-pict    		pict

Othr MIME types in default MS Windows Config.

audio/x-midi            	.mid

Other common UNIX types in conf/srm.conf and conf/mime.types on httpd servers.

x-compress        		Z
x-gzip          		gz    (gnu-compress) 
application/x-dvi               dvi   TeX DVI (Device Independent)

See: http.cc.bellcore.com/mosaic-info/name-ext.html a more complete list
of file name extensions, many without MIME types.

File Name Extension in Default httpd config. in ver. 2.2 2/94
and in Tony Sanders (sanders@bsdi.com) list at
 http://www.bsdi.com/HTTP:TNG/MIME-ClientProfile.html

 standard MIME types are marked `*'
 non-standard types with security concerns are marked `=' 
Content-Type:                                   Description
*application/activemessage
*application/andrew-inset                       Andrew-inset
*application/applefile
*application/atomicmail                         Atomicmail
*application/dca-rft                            IBM Doc Content Arch
*application/dec-dx                             Digital Doc Transfer
*application/mac-binhex40
*application/macwriteii
*application/msword
*application/news-message-id                    RFC 1036
*application/news-transmission                  RFC 1036
*application/octet-stream       bin             Uninterpreted Binary Data
*application/oda                oda
*application/pdf                pdf
*application/postscript         ai eps ps       PostScript
*application/remote-printing                    RFC 1486
*application/rtf                rtf             RTF
*application/slate                              Slate
*application/wita                               Wang Info Transfer
*application/wordperfect5.1
=application/x-csh              csh             CSH Script (major danger)
=application/x-dvi              dvi             TeX DVI (Device Independent)
 application/x-hdf              hdf             NCSA HDF data file
=application/x-latex            latex           LaTeX Source
 application/x-netcdf           nc cdf          Unidata netCDF data file
=application/x-sh               sh              SH Script (major danger)
=application/x-tcl              tcl             TCL Script (major danger)
=application/x-tex              tex             TeX Source
=application/x-texinfo          texinfo texi    Texinfo
=application/x-troff            t tr roff       Troff
=application/x-troff-man        man             Troff w/MAN Macros
=application/x-troff-me         me              Troff w/ME Macros
=application/x-troff-ms         ms              Troff w/MS Macros
 application/x-wais-source      src             WAIS Source
*application/zip                zip             PKZIP
=application/x-bcpio            bcpio           Old Binary CPIO
=application/x-cpio             cpio            IEEE Std1003.2 (``POSIX'') CPIO
=application/x-gtar             gtar            Gnu Tar
=application/x-shar             shar            Sh Shar
=application/x-sv4cpio          sv4cpio         SVR4 CPIO
=application/x-sv4crc           sv4crc          SVR4 CPIO w/CRC
=application/x-tar              tar             4.3BSD Tar 
=application/x-ustar            ustar           IEEE Std1003.2 (``POSIX'') Tar
 application/x-mif
*audio/basic                    au snd          8-bit u-law [PCM] / 8000 Hz
 audio/x-aiff                   aif aiff aifc
 audio/x-wav                    wav             MS Windows+ WAVE format
*image/gif                      gif             Graphics Interchange Format
*image/ief                      ief             Image Exchange Format
*image/jpeg                     jpeg jpg jpe
*image/tiff                     tiff tif        Tagged Image File Format
 image/x-cmu-raster             ras
 image/x-portable-anymap        pnm             PBM Anymap Format
 image/x-portable-bitmap        pbm             PBM Bitmap Format
 image/x-portable-graymap       pgm             PBM Graymap Format
 image/x-portable-pixmap        ppm             PBM Pixmap Format
 image/x-rgb                    rgb
 image/x-xbitmap                xbm             X Bitmaps
 image/x-xpixmap                xpm             X Pixmap format
 image/x-xwindowdump            xwd             X Window Dump (xwd)
*message/external-body
*message/news
*message/partial
*message/rfc822
*multipart/alternative
*multipart/appledouble
*multipart/digest
*multipart/mixed
*multipart/parallel
 text/html                      html            HTML
*text/plain                     txt             Plain Text
*text/richtext                  rtx             MIME Richtext format
*text/tab-separated-values      tsv             Tab Separated Values
 text/x-setext                  etx             Structure Enchanced Text
*video/mpeg                     mpeg mpg mpe    Motion Picture Experts Group
*video/quicktime                qt mov          QuickTime
 video/x-msvideo                avi             Microsoft Video for Windows
 video/x-sgi-movie              movie           SGI "movieplayer" movie
 www/*                                          Reserved Internal WWW type

