Have you been troubled in opening a B1 file? Are you afraid that the B1 file could threaten your computer privacy and make your computer a dangerous zone?
.B1 File Format #1
B1 System: 21st Century Mahjong
B1 Organization: No B1 Company Detailed
.B1 File Format #2
B1 Plan: Progress Database File
B1 Business: Progress Computer software Corporation