What is the term used for low-power states used to save energy?

The term "Sleep Modes" specifically refers to low-power states that are designed to save energy while still allowing for a quick resume to full operational capability. In sleep mode, a system reduces its power consumption by shutting down non-essential components while maintaining the ability to wake up quickly when needed. This is commonly used in various electronic devices, including computers and mobile devices, to extend battery life and reduce energy usage when the device is not actively in use.

Power Down Modes and Hibernate States also involve reducing power consumption, but they typically do not allow for as quick a resumption of full functionality as sleep modes do. Hibernate states, in particular, save the current state of the device to disk and completely power down, which consumes even less power than sleep modes but at the cost of longer wake-up times. Energy Saving States is a broader term that could encompass both sleep and hibernate modes, but it lacks the specificity that "Sleep Modes" carries in the context of this question.