As its successor L4, L3 is very lean and features fast, message-based, synchronous IPC, simple-to-use external paging mechanisms and a security mechanism based on secure domains (tasks, clans and chiefs).
Additionally, L3 implements system-wide persistency. ACI distributes a complete L3 operating system running on the L3 µ-kernel, featuring DOS emulation and an ELAN runtime system.
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