diff --git a/ConfigFile.rb b/ConfigFile.rb
index 9e1692e..5c61011 100644
--- a/ConfigFile.rb
+++ b/ConfigFile.rb
@@ -4,29 +4,32 @@ def initialize(file_string)
 		@lines = file_string
 	end
 
-	def load
-		process_lines(lines)
-	end
+	# maybe it's better to define "load" in subclasses so we can populate the subclass-specific member
+	# def load
+	# 	process_lines()
+	# end
 
 	def process_lines
-	#file_string is a string array, 
+	#file_string is a string array,
 	#extendable_hash is a hash that is created through this method
-		@needed_lines = []
-		lines.each do |line|
-			unless line.length == 0 || line[0] == '#' #filters empty lines and comments
+		needed_lines = []
+		@lines.each do |line|
+			unless line.strip.length == 0 || line[0] == '#' #filters empty lines and comments
 				needed_lines << line
 			end
 		end
 
+		@hash = {}
 		needed_lines.map do |line| #splits every line at empty spaces
-			line.split
+			line = line.split(" ")
+			@hash[line[0]] = line.drop(1) #line.drop(1) returns line without the first (0th) entry
 		end
 
-		@hash = {}
-		needed_lines.map do |line|
-			hash[line[0]] => line.drop(1) #line.drop(1) returns line without the first (0th) entry
-		end
 
-		return hash
+		# needed_lines.map do |line|
+		# 	hash[line[0]] = line.drop(1) #line.drop(1) returns line without the first (0th) entry
+		# end
+
+		return @hash
 	end
-end
\ No newline at end of file
+end
diff --git a/ConfigFileDriver.rb b/ConfigFileDriver.rb
new file mode 100644
index 0000000..15a6a83
--- /dev/null
+++ b/ConfigFileDriver.rb
@@ -0,0 +1,21 @@
+# we can use this to test HttpdConfig.rb and MimeTypes.rb
+#require_relative 'HttpdConfig'
+require_relative 'MimeTypes'
+class ConfigFileDriver
+
+    def start
+        lines_from_mime_types = IO.readlines "config/mime.types"
+        lines_from_httpd_config = IO.readlines "config/httpd.config"
+
+        #lines_from_httpd_config.each { |line| puts line }
+
+        # httpd_config = HttpdConfig.new( lines_from_mime_types )
+        # httpd_config.load
+
+        mime_types = MimeTypes.new( lines_from_mime_types )
+        mime_types.load
+        puts mime_types.for("html")
+    end
+
+    ConfigFileDriver.new().start
+end
diff --git a/Headers_Collection.rb b/Headers_Collection.rb
index 93d08b4..a837f91 100644
--- a/Headers_Collection.rb
+++ b/Headers_Collection.rb
@@ -10,5 +10,6 @@ def add(key, value)
 	def to_s
 		@headers.map do |key, value|
 			"#{key}: #{value}"
+		end
 	end
 end
\ No newline at end of file
diff --git a/MimeTypes.rb b/MimeTypes.rb
new file mode 100644
index 0000000..0eb7b8f
--- /dev/null
+++ b/MimeTypes.rb
@@ -0,0 +1,12 @@
+require_relative 'ConfigFile'
+class MimeTypes < ConfigFile
+
+
+	def load
+		@mime_types = process_lines()
+	end
+
+	def for(extension)
+		@mime_types[extension]
+	end
+end
diff --git a/config/httpd.config b/config/httpd.config
new file mode 100644
index 0000000..50a3876
--- /dev/null
+++ b/config/httpd.config
@@ -0,0 +1,2 @@
+DocumentRoot /home/somewhere
+ServerRoot   /home/server
diff --git a/config/mime.types b/config/mime.types
new file mode 100644
index 0000000..6cbbb2a
--- /dev/null
+++ b/config/mime.types
@@ -0,0 +1,644 @@
+3dm 	x-world/x-3dmf
+
+3dmf 	x-world/x-3dmf
+# comment
+a 	application/octet-stream
+aab 	application/x-authorware-bin
+aam 	application/x-authorware-map
+aas 	application/x-authorware-seg
+abc 	text/vnd.abc
+acgi 	text/html
+afl 	video/animaflex
+ai 	application/postscript
+aif 	audio/aiff
+aif 	audio/x-aiff
+aifc 	audio/aiff
+aifc 	audio/x-aiff
+aiff 	audio/aiff
+aiff 	audio/x-aiff
+aim 	application/x-aim
+aip 	text/x-audiosoft-intra
+ani 	application/x-navi-animation
+aos 	application/x-nokia-9000-communicator-add-on-software
+aps 	application/mime
+arc 	application/octet-stream
+arj 	application/arj
+arj 	application/octet-stream
+art 	image/x-jg
+asf 	video/x-ms-asf
+asm 	text/x-asm
+asp 	text/asp
+asx 	application/x-mplayer2
+asx 	video/x-ms-asf
+asx 	video/x-ms-asf-plugin
+au 	audio/basic
+au 	audio/x-au
+avi 	application/x-troff-msvideo
+avi 	video/avi
+avi 	video/msvideo
+avi 	video/x-msvideo
+avs 	video/avs-video
+bcpio 	application/x-bcpio
+bin 	application/mac-binary
+bin 	application/macbinary
+bin 	application/octet-stream
+bin 	application/x-binary
+bin 	application/x-macbinary
+bm 	image/bmp
+bmp 	image/bmp
+bmp 	image/x-windows-bmp
+boo 	application/book
+book 	application/book
+boz 	application/x-bzip2
+bsh 	application/x-bsh
+bz 	application/x-bzip
+bz2 	application/x-bzip2
+c 	text/plain
+c 	text/x-c
+c++ 	text/plain
+cat 	application/vnd.ms-pki.seccat
+cc 	text/plain
+cc 	text/x-c
+ccad 	application/clariscad
+cco 	application/x-cocoa
+cdf 	application/cdf
+cdf 	application/x-cdf
+cdf 	application/x-netcdf
+cer 	application/pkix-cert
+cer 	application/x-x509-ca-cert
+cha 	application/x-chat
+chat 	application/x-chat
+class 	application/java
+class 	application/java-byte-code
+class 	application/x-java-class
+com 	application/octet-stream
+com 	text/plain
+conf 	text/plain
+cpio 	application/x-cpio
+cpp 	text/x-c
+cpt 	application/mac-compactpro
+cpt 	application/x-compactpro
+cpt 	application/x-cpt
+crl 	application/pkcs-crl
+crl 	application/pkix-crl
+crt 	application/pkix-cert
+crt 	application/x-x509-ca-cert
+crt 	application/x-x509-user-cert
+csh 	application/x-csh
+csh 	text/x-script.csh
+css 	application/x-pointplus
+css 	text/css
+cxx 	text/plain
+dcr 	application/x-director
+deepv 	application/x-deepv
+def 	text/plain
+der 	application/x-x509-ca-cert
+dif 	video/x-dv
+dir 	application/x-director
+dl 	video/dl
+dl 	video/x-dl
+doc 	application/msword
+dot 	application/msword
+dp 	application/commonground
+drw 	application/drafting
+dump 	application/octet-stream
+dv 	video/x-dv
+dvi 	application/x-dvi
+dwf 	drawing/x-dwf (old)
+dwf 	model/vnd.dwf
+dwg 	application/acad
+dwg 	image/vnd.dwg
+dwg 	image/x-dwg
+dxf 	application/dxf
+dxf 	image/vnd.dwg
+dxf 	image/x-dwg
+dxr 	application/x-director
+el 	text/x-script.elisp
+elc 	application/x-bytecode.elisp (compiled elisp)
+elc 	application/x-elc
+env 	application/x-envoy
+eps 	application/postscript
+es 	application/x-esrehber
+etx 	text/x-setext
+evy 	application/envoy
+evy 	application/x-envoy
+exe 	application/octet-stream
+f 	text/plain
+f 	text/x-fortran
+f77 	text/x-fortran
+f90 	text/plain
+f90 	text/x-fortran
+fdf 	application/vnd.fdf
+fif 	application/fractals
+fif 	image/fif
+fli 	video/fli
+fli 	video/x-fli
+flo 	image/florian
+flx 	text/vnd.fmi.flexstor
+fmf 	video/x-atomic3d-feature
+for 	text/plain
+for 	text/x-fortran
+fpx 	image/vnd.fpx
+fpx 	image/vnd.net-fpx
+frl 	application/freeloader
+funk 	audio/make
+g 	text/plain
+g3 	image/g3fax
+gif 	image/gif
+gl 	video/gl
+gl 	video/x-gl
+gsd 	audio/x-gsm
+gsm 	audio/x-gsm
+gsp 	application/x-gsp
+gss 	application/x-gss
+gtar 	application/x-gtar
+gz 	application/x-compressed
+gz 	application/x-gzip
+gzip 	application/x-gzip
+gzip 	multipart/x-gzip
+h 	text/plain
+h 	text/x-h
+hdf 	application/x-hdf
+help 	application/x-helpfile
+hgl 	application/vnd.hp-hpgl
+hh 	text/plain
+hh 	text/x-h
+hlb 	text/x-script
+hlp 	application/hlp
+hlp 	application/x-helpfile
+hlp 	application/x-winhelp
+hpg 	application/vnd.hp-hpgl
+hpgl 	application/vnd.hp-hpgl
+hqx 	application/binhex
+hqx 	application/binhex4
+hqx 	application/mac-binhex
+hqx 	application/mac-binhex40
+hqx 	application/x-binhex40
+hqx 	application/x-mac-binhex40
+hta 	application/hta
+htc 	text/x-component
+htm 	text/html
+html 	text/html
+htmls 	text/html
+htt 	text/webviewhtml
+htx 	text/html
+ice 	x-conference/x-cooltalk
+ico 	image/x-icon
+idc 	text/plain
+ief 	image/ief
+iefs 	image/ief
+iges 	application/iges
+iges 	model/iges
+igs 	application/iges
+igs 	model/iges
+ima 	application/x-ima
+imap 	application/x-httpd-imap
+inf 	application/inf
+ins 	application/x-internett-signup
+ip 	application/x-ip2
+isu 	video/x-isvideo
+it 	audio/it
+iv 	application/x-inventor
+ivr 	i-world/i-vrml
+ivy 	application/x-livescreen
+jam 	audio/x-jam
+jav 	text/plain
+jav 	text/x-java-source
+java 	text/plain
+java 	text/x-java-source
+jcm 	application/x-java-commerce
+jfif 	image/jpeg
+jfif 	image/pjpeg
+jfif-tbnl 	image/jpeg
+jpe 	image/jpeg
+jpe 	image/pjpeg
+jpeg 	image/jpeg
+jpeg 	image/pjpeg
+jpg 	image/jpeg
+jpg 	image/pjpeg
+jps 	image/x-jps
+js 	application/x-javascript
+jut 	image/jutvision
+kar 	audio/midi
+kar 	music/x-karaoke
+ksh 	application/x-ksh
+ksh 	text/x-script.ksh
+la 	audio/nspaudio
+la 	audio/x-nspaudio
+lam 	audio/x-liveaudio
+latex 	application/x-latex
+lha 	application/lha
+lha 	application/octet-stream
+lha 	application/x-lha
+lhx 	application/octet-stream
+list 	text/plain
+lma 	audio/nspaudio
+lma 	audio/x-nspaudio
+log 	text/plain
+lsp 	application/x-lisp
+lsp 	text/x-script.lisp
+lst 	text/plain
+lsx 	text/x-la-asf
+ltx 	application/x-latex
+lzh 	application/octet-stream
+lzh 	application/x-lzh
+lzx 	application/lzx
+lzx 	application/octet-stream
+lzx 	application/x-lzx
+m 	text/plain
+m 	text/x-m
+m1v 	video/mpeg
+m2a 	audio/mpeg
+m2v 	video/mpeg
+m3u 	audio/x-mpequrl
+man 	application/x-troff-man
+map 	application/x-navimap
+mar 	text/plain
+mbd 	application/mbedlet
+mc$ 	application/x-magic-cap-package-1.0
+mcd 	application/mcad
+mcd 	application/x-mathcad
+mcf 	image/vasa
+mcf 	text/mcf
+mcp 	application/netmc
+me 	application/x-troff-me
+mht 	message/rfc822
+mhtml 	message/rfc822
+mid 	application/x-midi
+mid 	audio/midi
+mid 	audio/x-mid
+mid 	audio/x-midi
+mid 	music/crescendo
+mid 	x-music/x-midi
+midi 	application/x-midi
+midi 	audio/midi
+midi 	audio/x-mid
+midi 	audio/x-midi
+midi 	music/crescendo
+midi 	x-music/x-midi
+mif 	application/x-frame
+mif 	application/x-mif
+mime 	message/rfc822
+mime 	www/mime
+mjf 	audio/x-vnd.audioexplosion.mjuicemediafile
+mjpg 	video/x-motion-jpeg
+mm 	application/base64
+mm 	application/x-meme
+mme 	application/base64
+mod 	audio/mod
+mod 	audio/x-mod
+moov 	video/quicktime
+mov 	video/quicktime
+movie 	video/x-sgi-movie
+mp2 	audio/mpeg
+mp2 	audio/x-mpeg
+mp2 	video/mpeg
+mp2 	video/x-mpeg
+mp2 	video/x-mpeq2a
+mp3 	audio/mpeg3
+mp3 	audio/x-mpeg-3
+mp3 	video/mpeg
+mp3 	video/x-mpeg
+mpa 	audio/mpeg
+mpa 	video/mpeg
+mpc 	application/x-project
+mpe 	video/mpeg
+mpeg 	video/mpeg
+mpg 	audio/mpeg
+mpg 	video/mpeg
+mpga 	audio/mpeg
+mpp 	application/vnd.ms-project
+mpt 	application/x-project
+mpv 	application/x-project
+mpx 	application/x-project
+mrc 	application/marc
+ms 	application/x-troff-ms
+mv 	video/x-sgi-movie
+my 	audio/make
+mzz 	application/x-vnd.audioexplosion.mzz
+nap 	image/naplps
+naplps 	image/naplps
+nc 	application/x-netcdf
+ncm 	application/vnd.nokia.configuration-message
+nif 	image/x-niff
+niff 	image/x-niff
+nix 	application/x-mix-transfer
+nsc 	application/x-conference
+nvd 	application/x-navidoc
+o 	application/octet-stream
+oda 	application/oda
+omc 	application/x-omc
+omcd 	application/x-omcdatamaker
+omcr 	application/x-omcregerator
+p 	text/x-pascal
+p10 	application/pkcs10
+p10 	application/x-pkcs10
+p12 	application/pkcs-12
+p12 	application/x-pkcs12
+p7a 	application/x-pkcs7-signature
+p7c 	application/pkcs7-mime
+p7c 	application/x-pkcs7-mime
+p7m 	application/pkcs7-mime
+p7m 	application/x-pkcs7-mime
+p7r 	application/x-pkcs7-certreqresp
+p7s 	application/pkcs7-signature
+part 	application/pro_eng
+pas 	text/pascal
+pbm 	image/x-portable-bitmap
+pcl 	application/vnd.hp-pcl
+pcl 	application/x-pcl
+pct 	image/x-pict
+pcx 	image/x-pcx
+pdb 	chemical/x-pdb
+pdf 	application/pdf
+pfunk 	audio/make
+pfunk 	audio/make.my.funk
+pgm 	image/x-portable-graymap
+pgm 	image/x-portable-greymap
+pic 	image/pict
+pict 	image/pict
+pkg 	application/x-newton-compatible-pkg
+pko 	application/vnd.ms-pki.pko
+pl 	text/plain
+pl 	text/x-script.perl
+plx 	application/x-pixclscript
+pm 	image/x-xpixmap
+pm 	text/x-script.perl-module
+pm4 	application/x-pagemaker
+pm5 	application/x-pagemaker
+png 	image/png
+pnm 	application/x-portable-anymap
+pnm 	image/x-portable-anymap
+pot 	application/mspowerpoint
+pot 	application/vnd.ms-powerpoint
+pov 	model/x-pov
+ppa 	application/vnd.ms-powerpoint
+ppm 	image/x-portable-pixmap
+pps 	application/mspowerpoint
+pps 	application/vnd.ms-powerpoint
+ppt 	application/mspowerpoint
+ppt 	application/powerpoint
+ppt 	application/vnd.ms-powerpoint
+ppt 	application/x-mspowerpoint
+ppz 	application/mspowerpoint
+pre 	application/x-freelance
+prt 	application/pro_eng
+ps 	application/postscript
+psd 	application/octet-stream
+pvu 	paleovu/x-pv
+pwz 	application/vnd.ms-powerpoint
+py 	text/x-script.phyton
+pyc 	applicaiton/x-bytecode.python
+qcp 	audio/vnd.qcelp
+qd3 	x-world/x-3dmf
+qd3d 	x-world/x-3dmf
+qif 	image/x-quicktime
+qt 	video/quicktime
+qtc 	video/x-qtc
+qti 	image/x-quicktime
+qtif 	image/x-quicktime
+ra 	audio/x-pn-realaudio
+ra 	audio/x-pn-realaudio-plugin
+ra 	audio/x-realaudio
+ram 	audio/x-pn-realaudio
+ras 	application/x-cmu-raster
+ras 	image/cmu-raster
+ras 	image/x-cmu-raster
+rast 	image/cmu-raster
+rexx 	text/x-script.rexx
+rf 	image/vnd.rn-realflash
+rgb 	image/x-rgb
+rm 	application/vnd.rn-realmedia
+rm 	audio/x-pn-realaudio
+rmi 	audio/mid
+rmm 	audio/x-pn-realaudio
+rmp 	audio/x-pn-realaudio
+rmp 	audio/x-pn-realaudio-plugin
+rng 	application/ringing-tones
+rng 	application/vnd.nokia.ringing-tone
+rnx 	application/vnd.rn-realplayer
+roff 	application/x-troff
+rp 	image/vnd.rn-realpix
+rpm 	audio/x-pn-realaudio-plugin
+rt 	text/richtext
+rt 	text/vnd.rn-realtext
+rtf 	application/rtf
+rtf 	application/x-rtf
+rtf 	text/richtext
+rtx 	application/rtf
+rtx 	text/richtext
+rv 	video/vnd.rn-realvideo
+s 	text/x-asm
+s3m 	audio/s3m
+saveme 	application/octet-stream
+sbk 	application/x-tbook
+scm 	application/x-lotusscreencam
+scm 	text/x-script.guile
+scm 	text/x-script.scheme
+scm 	video/x-scm
+sdml 	text/plain
+sdp 	application/sdp
+sdp 	application/x-sdp
+sdr 	application/sounder
+sea 	application/sea
+sea 	application/x-sea
+set 	application/set
+sgm 	text/sgml
+sgm 	text/x-sgml
+sgml 	text/sgml
+sgml 	text/x-sgml
+sh 	application/x-bsh
+sh 	application/x-sh
+sh 	application/x-shar
+sh 	text/x-script.sh
+shar 	application/x-bsh
+shar 	application/x-shar
+shtml 	text/html
+shtml 	text/x-server-parsed-html
+sid 	audio/x-psid
+sit 	application/x-sit
+sit 	application/x-stuffit
+skd 	application/x-koan
+skm 	application/x-koan
+skp 	application/x-koan
+skt 	application/x-koan
+sl 	application/x-seelogo
+smi 	application/smil
+smil 	application/smil
+snd 	audio/basic
+snd 	audio/x-adpcm
+sol 	application/solids
+spc 	application/x-pkcs7-certificates
+spc 	text/x-speech
+spl 	application/futuresplash
+spr 	application/x-sprite
+sprite 	application/x-sprite
+src 	application/x-wais-source
+ssi 	text/x-server-parsed-html
+ssm 	application/streamingmedia
+sst 	application/vnd.ms-pki.certstore
+step 	application/step
+stl 	application/sla
+stl 	application/vnd.ms-pki.stl
+stl 	application/x-navistyle
+stp 	application/step
+sv4cpio 	application/x-sv4cpio
+sv4crc 	application/x-sv4crc
+svf 	image/vnd.dwg
+svf 	image/x-dwg
+svr 	application/x-world
+svr 	x-world/x-svr
+swf 	application/x-shockwave-flash
+t 	application/x-troff
+talk 	text/x-speech
+tar 	application/x-tar
+tbk 	application/toolbook
+tbk 	application/x-tbook
+tcl 	application/x-tcl
+tcl 	text/x-script.tcl
+tcsh 	text/x-script.tcsh
+tex 	application/x-tex
+texi 	application/x-texinfo
+texinfo 	application/x-texinfo
+text 	application/plain
+text 	text/plain
+tgz 	application/gnutar
+tgz 	application/x-compressed
+tif 	image/tiff
+tif 	image/x-tiff
+tiff 	image/tiff
+tiff 	image/x-tiff
+tr 	application/x-troff
+tsi 	audio/tsp-audio
+tsp 	application/dsptype
+tsp 	audio/tsplayer
+tsv 	text/tab-separated-values
+turbot 	image/florian
+txt 	text/plain
+uil 	text/x-uil
+uni 	text/uri-list
+unis 	text/uri-list
+unv 	application/i-deas
+uri 	text/uri-list
+uris 	text/uri-list
+ustar 	application/x-ustar
+ustar 	multipart/x-ustar
+uu 	application/octet-stream
+uu 	text/x-uuencode
+uue 	text/x-uuencode
+vcd 	application/x-cdlink
+vcs 	text/x-vcalendar
+vda 	application/vda
+vdo 	video/vdo
+vew 	application/groupwise
+viv 	video/vivo
+viv 	video/vnd.vivo
+vivo 	video/vivo
+vivo 	video/vnd.vivo
+vmd 	application/vocaltec-media-desc
+vmf 	application/vocaltec-media-file
+voc 	audio/voc
+voc 	audio/x-voc
+vos 	video/vosaic
+vox 	audio/voxware
+vqe 	audio/x-twinvq-plugin
+vqf 	audio/x-twinvq
+vql 	audio/x-twinvq-plugin
+vrml 	application/x-vrml
+vrml 	model/vrml
+vrml 	x-world/x-vrml
+vrt 	x-world/x-vrt
+vsd 	application/x-visio
+vst 	application/x-visio
+vsw 	application/x-visio
+w60 	application/wordperfect6.0
+w61 	application/wordperfect6.1
+w6w 	application/msword
+wav 	audio/wav
+wav 	audio/x-wav
+wb1 	application/x-qpro
+wbmp 	image/vnd.wap.wbmp
+web 	application/vnd.xara
+wiz 	application/msword
+wk1 	application/x-123
+wmf 	windows/metafile
+wml 	text/vnd.wap.wml
+wmlc 	application/vnd.wap.wmlc
+wmls 	text/vnd.wap.wmlscript
+wmlsc 	application/vnd.wap.wmlscriptc
+word 	application/msword
+wp 	application/wordperfect
+wp5 	application/wordperfect
+wp5 	application/wordperfect6.0
+wp6 	application/wordperfect
+wpd 	application/wordperfect
+wpd 	application/x-wpwin
+wq1 	application/x-lotus
+wri 	application/mswrite
+wri 	application/x-wri
+wrl 	application/x-world
+wrl 	model/vrml
+wrl 	x-world/x-vrml
+wrz 	model/vrml
+wrz 	x-world/x-vrml
+wsc 	text/scriplet
+wsrc 	application/x-wais-source
+wtk 	application/x-wintalk
+xbm 	image/x-xbitmap
+xbm 	image/x-xbm
+xbm 	image/xbm
+xdr 	video/x-amt-demorun
+xgz 	xgl/drawing
+xif 	image/vnd.xiff
+xl 	application/excel
+xla 	application/excel
+xla 	application/x-excel
+xla 	application/x-msexcel
+xlb 	application/excel
+xlb 	application/vnd.ms-excel
+xlb 	application/x-excel
+xlc 	application/excel
+xlc 	application/vnd.ms-excel
+xlc 	application/x-excel
+xld 	application/excel
+xld 	application/x-excel
+xlk 	application/excel
+xlk 	application/x-excel
+xll 	application/excel
+xll 	application/vnd.ms-excel
+xll 	application/x-excel
+xlm 	application/excel
+xlm 	application/vnd.ms-excel
+xlm 	application/x-excel
+xls 	application/excel
+xls 	application/vnd.ms-excel
+xls 	application/x-excel
+xls 	application/x-msexcel
+xlt 	application/excel
+xlt 	application/x-excel
+xlv 	application/excel
+xlv 	application/x-excel
+xlw 	application/excel
+xlw 	application/vnd.ms-excel
+xlw 	application/x-excel
+xlw 	application/x-msexcel
+xm 	audio/xm
+xml 	application/xml
+xml 	text/xml
+xmz 	xgl/movie
+xpix 	application/x-vnd.ls-xpix
+xpm 	image/x-xpixmap
+xpm 	image/xpm
+x-png 	image/png
+xsr 	video/x-amt-showrun
+xwd 	image/x-xwd
+xwd 	image/x-xwindowdump
+xyz 	chemical/x-pdb
+z 	application/x-compress
+z 	application/x-compressed
+zip 	application/x-compressed
+zip 	application/x-zip-compressed
+zip 	application/zip
+zip 	multipart/x-zip
+zoo 	application/octet-stream
+zsh 	text/x-script.zsh