C and Python are the two programming languages commonly used for developing autonomous driving systems. C is a classic low-level programming language that allows developers to program at a low level, meaning they have more control over the hardware. It offers several advantages over other languages, including robust agility and faster implementation. On the other hand, Python is considered much easier to use for various other software and is often used for prototyping algorithms in autonomous driving systems. While most code that runs on the vehicle tends to be C, many engineers spend most of their time prototyping algorithms in Python.