AD2 file extension is for ADPCM 2-bit compressed voice file ZFAX
Similar to AD2
1ST - Usually README.1ST text24B - 24bit data Bitmap graphics
286 - Virtual device driver Windows standard mode
2GR - VGA graphics driver Windows Video grabber
301 - Fax Super FAX 2000 - Fax-Mail 96
386 - Virtual device driver Windows 386 enhanced mode
3D2 - Atari Stereo CAD-3D 3D data file
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