μC/OS-II已经在世界范围内得到广泛使用，包括诸多领域，如手机、路由器、集线器、不间断电源、飞行器、医疗设备及工业控制等。实际上，μC/OS-II已经通过了非常严格的测试，并且得到了美国航空管理局(Federal Aviation Administration)的认证，可以用在飞行器上。这说明μC/OS-II是稳定可靠的，可用于与人性命攸关的安全紧要(safety critical)系统；当然，也可用于非安全紧要系统。 -μC/OS-II has been widely used worldwide, including many areas, such as mobile phones, routers, hubs, uninterruptible power supply, aircraft, medical equipment and industrial control. In fact, μC/OS-II has been through a very rigorous testing, and by the U.S. FAA (Federal Aviation Administration) certification, can be used in aircraft. This shows that μC/OS-II is a stable and reliable and can be used with the security of critical life-or-death (safety critical) system　of course, can also be used for non-safety critical systems.