Boardview for the Quanta N83C motherboard, packed in a small RAR archive of about 100 KB. No revision or end-product model is stated in the name, so compare the project code and revision on the PCB before relying on part locations. A boardview lets a technician find components, test points and nets on both sides of the board, which speeds up short hunting and voltage measurements. Extract the archive first, then open the file in a viewer such as OpenBoardView, FlexBV or Boardviewer, depending on the exact format inside.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @IT_SERVICE_WORLD. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.