Hello all This is a message to let people know that version 0.1.0 of LionsOS has been released. LionsOS is aimed at embedded, IoT and cyberphysical systems and is designed to be formally verifiable, adaptable to a wide class of use cases in the target domain, while at the same time setting the benchmark for performance of microkernel-based operating systems. We expect to achieve all three aims by a highly modular yet ruthlessly performance-oriented design and strict adherence to the time-honoured KISS principle. LionsOS is still in its early stages but we are at the point where we have a non-trivial example system and initial documentation. You can find the website here: https://lionsos.org/ and the source code here: https://github.com/au-ts/lionsos Thanks, Ivan