Bill of materials for the ASUS A8S notebook, delivered as a 123 KB RAR archive. A BOM lists the parts fitted to the mainboard with reference designators, values and manufacturer part numbers, which helps when sourcing a replacement chip, checking a capacitor or resistor value, or confirming which IC variant is populated. It is usually read in a spreadsheet or text viewer. Use it alongside a schematic or boardview, and check that the board revision matches, as part lists change between builds.
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 @boardviewsandachematics. 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.