rCore-Tutorial-v3 is an educational project designed to guide learners through the process of building a minimalistic operating system from scratch using the Rust programming language. Targeting the RISC-V architecture, this tutorial emphasizes safety and concurrency, leveraging Rust's features to teach OS fundamentals such as memory management, process scheduling, and file systems. It is structured to provide hands-on experience, making it suitable for both academic settings and self-study.