Raspberry Pi OS is optimized for Raspberry Pi devices and includes various pre-installed software packages. Ubuntu: Ubuntu Server for Raspberry Pi 4, suitable for server-based projects and IoT applications. The official version of Kali Linux, tailored for Raspberry Pi 4, provides security tools and utilities. Arch Linux ARM: Arch Linux ARM provides a minimal base system for more experienced users. Manjaro offers a more user-friendly and out-of-the-box experience.