Samples of Directory Icons
These are the icons that are used for the automatic directory indexing feature of NCSA httpd for Windows:
back.xbm
binary.xbm
ftp.xbm
image.xbm
index.xbm
menu.xbm
movie.xbm
sound.xbm
telnet.xbm
text.xbm
unknown.xbm
back.xbm 
binary.xbm 
ftp.xbm 
image.xbm 
index.xbm 
menu.xbm 
movie.xbm 
sound.xbm
telnet.xbm 
text.xbm 
unknown.xbm