Why There is a difference between assembly languages like Windows, Linux?

Question

I am relatively new to all this low level stuff,assembly language.. and want to learn more detail. Why there is a difference between Linux, Windows Assembly languages?

Answer 1

In addition to other answers.

OS dictates its Application Binary Interface (ABI), which includes format of executable objects. These are Executable and Linkable Format (ELF) for Linux (and many other Unix-like systems), and Portable Executable (PE) on Windows. See this table for other formats.