A bgb file extension is related to the Beck Graphics Bitmap, a bitmap file format used by Beck IPC’s graphics controllers.
BGB file extension - Beck Graphics Bitmap
What is bgb file? How to open bgb files?
File type specification:
The bgb file extension is used for the Beck Graphics Bitmap file format, a bitmap file format optimized for usage in conjunction with Beck IPC’s graphics controllers.
The BGB file format uses the color format also used internally by the graphics controllers and can thus be loaded and processed faster than other graphics file formats.