IM1 file extension is for Bitmap graphics 1bit Sun raster file
Similar to IM1
777 - Compressed file archiver 7777z - 7-Zip format LZW compressed file
8 - Assembly language source code file A86
85 - 85x85 dpi display font Ventura Publisher
8BF - Adobe Illustrator Filter
8CM - 8 Channel Module Music
8M - Math 8 extended character set printer font PageMaker
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