Archive for a Wyse device labelled R10L, in a 693 KB RAR. The name does not say whether it holds firmware, a schematic or another document, so open it to see what is inside. Wyse R-class units are thin clients, and small archives of this kind usually contain a BIOS image or service data. If it proves to be a firmware image, check that its size matches the flash chip on the board and read the existing contents with a programmer before writing anything.
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 @hrtechno. 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.
7-ZipWinRARThe Unarchiver (macOS)