Newer laptops and tablets that use ACPI may have thermal sensors
outside the core CPU/SOC for thermal safety reasons. These
temperature sensors are also exposed for the OS to use via the so
called INT3403 ACPI object. This driver will, on devices that have
such sensors, expose the temperature information from these sensors
to userspace via the normal thermal framework. This means that a wide
range of applications and GUI widgets can show this information to
the user or use this information for making decisions. For example,
the Intel Thermal Daemon can use this information to allow the user
to select his laptop to run without turning on the fans.