B1N file extension is for 1st Reader mono and color binary screen image Bitmap graphics
Similar to B1N
$O1 - Pipe file
DOS
$VM - Virtual manager temporary file
Windows 3.x
&&& - Temporary file
)2( - LHA archiver temporary file
LHA
.GP - Glue Geode Parameter File
.GP - Gofer
Project
0 - Compressed harddisk data
DoubleSpace
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