C is the most common language for developing OS. It is known for its low-level system access, efficiency, and portability.
C++ is an extension of C and offers object-oriented features. Some OS, like Microsoft Windows, have parts of their kernel written in C++.
It's often used for writing the most critical parts of an operating system, such as the bootloader and hardware drivers.
D is a systems programming language, It provides modern features and is designed for high performance.
It is gaining popularity for its ability to write low-level code with a reduced risk of memory-related bugs.
It has been used in some critical systems, including operating systems for aerospace and military applications.
Nim is a systems programming language that aims for efficiency and provides both high-level and low-level programming capabilities.