A database of common filetypes on Internet.
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database
|____text
|____data
|____audio
|____video
|____ebook
|____3d_image
|____raster_image
|____vector_image
|____camera_raw
|____page_layout
|____spreadsheet
|____database
|____executable
|____game
|____cad
|____gis
|____web
|____plugin
|____font
|____system
|____settings
|____encoded
|____compressed
|____disk_image
|____developer
|____backup
|____misc