IM1 file extension is for Bitmap graphics 1bit Sun raster file
Similar to IM1
.GP - Gofer Project0 - Compressed harddisk data DoubleSpace
000 - Common filename extension GEOS
000 - Compressed harddisk data DoubleSpace
001 - Fax Hayes JT FAX many
075 - 75x75 dpi display font Ventura Publisher
085 - 85x85 dpi display font Ventura Publisher
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