Short readme text of 38 bytes meant to be opened before using the files it accompanies. The name gives no device or board details, and the small size means it holds a single brief instruction or remark, perhaps a password, a warning or a note about which image to flash. It opens in any text editor. Read it before programming any chip from the same set, because such notes often mention required steps like cleaning the ME region or restoring serial data after flashing.
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 @biosfilebins. Enginerys does not host this file.