Operating Systems – Foundations of Modern Computing - Zephyr : Real-Time Operating System (RTOS)

Zephyr: The Open-Source Embedded RTOS An overview of Zephyr, an open-source Real-Time Operating System (RTOS) managed as a collaborative project under the Linux Foundation, which is purpose-built for connected, resource-constrained embedded devices and the Internet of Things (IoT). Historically stemming from Wind River's Rocket OS, the project was established in 2016 and aims to provide all necessary components—including protocol stacks, device drivers, and a configurable kernel—to develop full application software. Zephyr’s technical foundation features a highly configurable and modular monolithic kernel, uses configuration systems like Kconfig, and relies on the specialized West utility tool to manage developer workflows. The robust developer ecosystem is evidenced by the release of Zephyr 4.3 and its capacity to support over 900 diverse hardware boards, positioning it as a mature platform for commercial products. Furthermore, the project maintains strong community governance, offering resources like Discord channels and vulnerability alerts to ensure continuous security and development.