M7 file extension is for Sound Farallon's MacRecorder format sampling rate 7k
Similar to M7
7z - 7-Zip format LZW compressed file8 - 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
8MED - Amiga OctaMed Music file
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