TIG file extension is for Tiger file U S Government distributed maps
Similar to TIG
3D2 - Atari Stereo CAD-3D 3D data file3DM - QuickDraw 3D Metafile QuickDraw
3DMF - QuickDraw 3D Metafile QuickDraw
3DS - Graphics Autodesk 3D Studio
3FX - 3D effects CorelChart
3gp - Video format compatible with mobile devices
3GR - VGA graphics driver Windows Video grabber
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