RG file extension is for 1bit B&W 4bit CMYK Raster Graphics format
Similar to RG
A4P - Authorware File Without RuntimeA5W - Unpackaged Authorware Windows File
A60 - Roland Garros Tennis MVTS File
A64 - Artist 64 file
A6P - Authorware Application
A8 - Alpha channel image data 24-bit 3D animation Cubicomp PictureMaker
A8 - Cubicomp PictureMaker 24bit 3D Animation file
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