RAR archive labelled TOP for the Compal board LA-A101P, likely the top-side component view or layout of the PCB. A matching BOTTOM file of the same size exists, so the pair probably covers both sides of the board. Top-side views help locate chips, connectors, test points and power components when measuring rails or tracking down a short. Compal uses the LA-xxxxP numbering for laptop boards across multiple brands; confirm the number and revision on the PCB before using the part positions.
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 @SCHEMATICWORLD. 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.