Boardview file in BRD format for a board coded UM3B-MB-E. The name gives no brand or model, and the MB-E ending likely marks the board revision.

Boardview in BRD format for a board coded R23-MB-D. No laptop brand or model is given; the MB-D ending likely marks a board revision.

Boardview in BRD format for board QD-GC9-MB-D; the name gives no laptop brand or model, and the trailing D likely marks the revision.

Duplicate-named copy of the QD-GC9-MB-D boardview in BRD format, at the same 252 KB as the original, so it is most likely identical.