FZ boardview for an A55M-E motherboard, PCB revision 1.02 as given in the name. The model code looks like a micro-ATX desktop board in ASUS-style naming, but the brand is not written in the file name. Technicians load files like this into OpenBoardView, FlexBV or a similar program to locate capacitors, MOSFETs and test points, trace signals between chips and pick probing spots when chasing a short to ground. Check the revision printed near the slots before relying on component positions, since a different revision may use another layout.
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 @boardview. Enginerys does not host this file.
How to open a .fz file
Compressed and encrypted boardview used for ASUS, ASRock and Pegatron boards.