Without ACPI capability, as seen on older equipment, rest setting is generally limited to shutting off the screen and also spinning down the hard drive. Sleep mode has actually passed numerous names, including Wait, Put On Hold and Put On Hold to RAM. Equipment state is kept in RAM and, when placed in rest mode, the computer system cuts power to unneeded subsystems and positions the RAM right into a minimum power state, simply sufficient to maintain its data. As a result of the big power saving, most laptop computers immediately enter this mode when the computer is operating on batteries and the cover is closed. If undesired, the actions can be changed in the operating system settings.