BD file extension - Solaris Browser data file
What is bd file? How to open bd files?
File type specification:
The BD file extension was also used by Solaris browser and used for files that contained browser data.
A browser data file created by the compiler when you use the SourceBrowser option during compilation. These *.bd files with index files are usually found in a .SB directory; created in the current working directory from which the compiler is called.