What's inside a .EXE File?

What is inside the Windows Executable or the executables for other operating systems? I take a look at the past from the days of DOS until the present and crack open a few EXE files to get a look inside. Explored also is programming without a compiler, linker, or any kind of processing code before execution. Is programming in raw machine code possible?


Altair 8800 Demonstration:
   • Altair 8800  - Video #2 - Front Panel...  

Learning x64 Assembly:
   • Modern x64 Assembly 1: Beginning Asse...  
https://stackoverflow.com/questions/6...

kernel32 lib:
https://github.com/repnz/snax86/blob/...
kernel32 and kernel64 are the same thing.

Windows 1.0 online:
https://www.pcjs.org/software/pcx86/s...