The following is a list of common MIME mappings for extensions:
.323 - text/h323
.asx - video/x-ms-asf
.acx - application/internet-property-stream
.ai - application/postscript
.aif - audio/x-aiff
.aiff - audio/aiff
.axs - application/olescript
.aifc - audio/aiff
.asr - video/x-ms-asf
.avi - video/x-msvideo
.asf - video/x-ms-asf
.au - audio/basic
.application - application/x-ms-application
.bin - application/octet-stream
.bas - text/plain
.bcpio - application/x-bcpio
.bmp - image/bmp
.cdf - application/x-cdf
.cat - application/vndms-pkiseccat
.crt - application/x-x509-ca-cert
.c - text/plain
.css - text/css
.cer - application/x-x509-ca-cert
.crl - application/pkix-crl
.cmx - image/x-cmx
.csh - application/x-csh
.cod - image/cis-cod
.cpio - application/x-cpio
.clp - application/x-msclip
.crd - application/x-mscardfile
.deploy - application/octet-stream
.dll - application/x-msdownload
.dot - application/msword
.doc - application/msword
.dvi - application/x-dvi
.dir - application/x-director
.dxr - application/x-director
.der - application/x-x509-ca-cert
.dib - image/bmp
.dcr - application/x-director
.disco - text/xml
.exe - application/octet-stream
.etx - text/x-setext
.evy - application/envoy
.eml - message/rfc822
.eps - application/postscript
.flr - x-world/x-vrml
.fif - application/fractals
.gtar - application/x-gtar
.gif - image/gif
.gz - application/x-gzip
.hta - application/hta
.htc - text/x-component
.htt - text/webviewhtml
.h - text/plain
.hdf - application/x-hdf
.hlp - application/winhlp
.html - text/html
.htm - text/html
.hqx - application/mac-binhex40
.isp - application/x-internet-signup
.iii - application/x-iphone
.ief - image/ief
.ivf - video/x-ivf
.ins - application/x-internet-signup
.ico - image/x-icon
.jpg - image/jpeg
.jfif - image/pjpeg
.jpe - image/jpeg
.jpeg - image/jpeg
.js - application/x-javascript
.lsx - video/x-la-asf
.latex - application/x-latex
.lsf - video/x-la-asf
.manifest - application/x-ms-manifest
.mhtml - message/rfc822
.mny - application/x-msmoney
.mht - message/rfc822
.mid - audio/mid
.mpv2 - video/mpeg
.man - application/x-troff-man
.mvb - application/x-msmediaview
.mpeg - video/mpeg
.m3u - audio/x-mpegurl
.mdb - application/x-msaccess
.mpp - application/vnd.ms-project
.m1v - video/mpeg
.mpa - video/mpeg
.me - application/x-troff-me
.m13 - application/x-msmediaview
.movie - video/x-sgi-movie
.m14 - application/x-msmediaview
.mpe - video/mpeg
.mp2 - video/mpeg
.mov - video/quicktime
.mp3 - audio/mpeg
.mpg - video/mpeg
.ms - application/x-troff-ms
.nc - application/x-netcdf
.nws - message/rfc822
.oda - application/oda
.ods - application/oleobject
.pmc - application/x-perfmon
.p7r - application/x-pkcs7-certreqresp
.p7b - application/x-pkcs7-certificates
.p7s - application/pkcs7-signature
.pmw - application/x-perfmon
.ps - application/postscript
.p7c - application/pkcs7-mime
.pbm - image/x-portable-bitmap
.ppm - image/x-portable-pixmap
.pub - application/x-mspublisher
.pnm - image/x-portable-anymap
.pml - application/x-perfmon
.p10 - application/pkcs10
.pfx - application/x-pkcs12
.p12 - application/x-pkcs12
.pdf - application/pdf
.pps - application/vnd.ms-powerpoint
.p7m - application/pkcs7-mime
.pko - application/vndms-pkipko
.ppt - application/vnd.ms-powerpoint
.pmr - application/x-perfmon
.pma - application/x-perfmon
.pot - application/vnd.ms-powerpoint
.prf - application/pics-rules
.pgm - image/x-portable-graymap
.qt - video/quicktime
.ra - audio/x-pn-realaudio
.rgb - image/x-rgb
.ram - audio/x-pn-realaudio
.rmi - audio/mid
.ras - image/x-cmu-raster
.roff - application/x-troff
.rtf - application/rtf
.rtx - text/richtext
.sv4crc - application/x-sv4crc
.spc - application/x-pkcs7-certificates
.setreg - application/set-registration-initiation
.snd - audio/basic
.stl - application/vndms-pkistl
.setpay - application/set-payment-initiation
.stm - text/html
.shar - application/x-shar
.sh - application/x-sh
.sit - application/x-stuffit
.spl - application/futuresplash
.sct - text/scriptlet
.scd - application/x-msschedule
.sst - application/vndms-pkicertstore
.src - application/x-wais-source
.sv4cpio - application/x-sv4cpio
.tex - application/x-tex
.tgz - application/x-compressed
.t - application/x-troff
.tar - application/x-tar
.tr - application/x-troff
.tif - image/tiff
.txt - text/plain
.texinfo - application/x-texinfo
.trm - application/x-msterminal
.tiff - image/tiff
.tcl - application/x-tcl
.texi - application/x-texinfo
.tsv - text/tab-separated-values
.ustar - application/x-ustar
.uls - text/iuls
.vcf - text/x-vcard
.wps - application/vnd.ms-works
.wav - audio/wav
.wrz - x-world/x-vrml
.wri - application/x-mswrite
.wks - application/vnd.ms-works
.wmf - application/x-msmetafile
.wcm - application/vnd.ms-works
.wrl - x-world/x-vrml
.wdb - application/vnd.ms-works
.wsdl - text/xml
.xml - text/xml
.xlm - application/vnd.ms-excel
.xaf - x-world/x-vrml
.xla - application/vnd.ms-excel
.xls - application/vnd.ms-excel
.xof - x-world/x-vrml
.xlt - application/vnd.ms-excel
.xlc - application/vnd.ms-excel
.xsl - text/xml
.xbm - image/x-xbitmap
.xlw - application/vnd.ms-excel
.xpm - image/x-xpixmap
.xwd - image/x-xwindowdump
.xsd - text/xml
.z - application/x-compress
.zip - application/x-zip-compressed
.* - application/octet-stream