Meaning of Wx and Jx symbols in mechanics

[nipume07]

TL;DR

I have those 2 formula WX=..cm^3 and Jx=...cm^4. Please check the picture attached here. What does Wx and Jx mean?

Hello .I need help about hr meaning of Wx & Jx? What does these symbol mean?

 

[Baluncore]

Welcome to PF.
What is the subject?
Window mechanical or thermal design?
Please give us a link to the original document.

 

[LT Judd]

Jx is probably 2nd moment of area (aka moment of inertia) about x-axis , seeing as its units are cm4.
and Wx is probably section modulus about x axis