Operating systems are crucial to computer science – after all, it’s what allows your computer to run as seamlessly as it does. While a momentous task, creating your own OS can help to really elevate your understanding of the lower-level aspects of your computer. A project like this isn’t something you’ll finish in a week, but any progress will help you understand one of the most detail-oriented parts of the course. This requires some background knowledge, so it’s recommended as an extension project.