A bc4 file extension is related to the CoStar software and used for its bar code files.
BC4 file extension - CoStar bar code
What is bc4 file? How to open bc4 files?
File type specification:
The bc4 file extension is associated with the CoStar software for market and asset analysis, and Internet marketing. The bc4 file stores bar code data.
The CoStar software that uses bc4 files seems to be obsolete product without support from the developer.
This bc4 file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.