TowerOS is a high-assurance operating system for paranoid individuals and high-value targets. TowerOS has an unusual architecture: it combines multiple, independent computers into a single virtual system with a composited user interface. Each security domain is relegated to a separate host (e.g. a Raspberry Pi), and the user runs their applications from a thin client (e.g. a laptop) over a LAN using standard network protocols (SSH and NX). It's sort of like Qubes OS, but inside-out—instead of dividing a single computer up into multiple security domains at the level of the hypervisor, TowerOS combines multiple computers together with the smallest trusted computing base possible while still providing a user-friendly system. For more information, please refer to the official project documentation.