Thelio is a line of custom-built, high-performance desktop computers from System76, designed for Linux users, known for their unique wood-and-metal aesthetics, open-hardware philosophy, excellent thermal management, and easy upgradeability (except for the motherboard), targeting professionals like engineers and creators. Key features include a distinct case, optimized airflow, hot-swappable drive bays, and a commitment to open source, with models ranging from powerful workstations (Thelio Mega for AI) to standard desktops, often running Pop!_OS,.