BK6 file extension is for Timed backup file for document window 6
WordPerfect for Win
Similar to BK6
$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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