What are the 6 areas that defense spending is broken into?

What are the 6 areas that defense spending is broken into? What impacts the defense spending “cycle” and how do private sector contracts impact the overall budget? How is the defense “market” different from the traditional US economic market? Do you believe that US national security is “implied” and “perceived” based on the overall GDP that the US contributes even if cuts do not impact performance? What area of the US Defense budget do you believe should have top funding priority; why? How does the “Space Force” impact other branches?