what framework is ue4 based on

hi guys

for some development i need to know what framework(or frameworks) is ue4 built on?

can you explain to me

UE4 is built on a slew of frameworks, opening up the source code in Visual Studio will show you everything that’s added in the source pane. Each project as the name of the different parts of the engine as well as the code for everything that’s open sourced, and digging around in the binaries directory you can find some other executables that are used in building and maintaining.

Look in the RHI module and you see… that’s just the most important ones btw.
There’s just too many APIs.