12M file extension is for Lotus123 Smartmaster file




Similar to 12M

### - DoubleSpace Compressed volume file
### - QTIC Temp file
#24 - LocoScript Printer data file for 24 pin matrix printer
#GF - MetaFont Font file
#IB - LocoScript Printer data file
#SC - LocoScript Printer data file
#ST - LocoScript Standard mode printer definition file

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