What is the term for the ability of a system to react to events without human intervention?

The term that describes the ability of a system to react to events without human intervention is real-time response. This concept is central to systems designed to operate autonomously, allowing them to monitor conditions, process information, and execute actions in response to specific stimuli or changes in the environment without requiring oversight from a human operator. Real-time responsive systems are crucial in applications such as automated manufacturing, emergency response systems, and smart home technologies, where timely decisions are essential.

Ubiquitous computing pertains to the idea of integrating computing capabilities into everyday objects, making them aware of their environment, but it doesn't explicitly focus on the autonomy of event reaction. Embedded systems refer to computer systems that are part of larger devices and perform dedicated functions, but the term does not inherently convey the ability to react without human intervention. Sleep states refer to power-saving modes in devices and are unrelated to the concept of autonomous event handling.