A boardview (component placement) file. Shared as “INVENTEC CRYSTAL 1.0 SI - GERBER.F2B” — a .f2b file, 2.45 MB.
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 @ShareMan_Electronic_Files. Enginerys does not host this file.
How to open a .f2b file
Boardview exported from Unisoft ProntoPLACE, occasionally used for MSI and industrial boards.
OpenBoardViewUnisoft ProntoPLACE viewer