The ITE IT8518E is an embedded controller widely used in laptop motherboards to manage system-level functions and power control. Manufactured by ITE Tech Inc., it handles keyboard input, battery management, thermal monitoring, fan control, and ACPI power sequencing. The controller communicates with the main chipset over the LPC interface and plays a critical role in system startup and hardware coordination. Its integration improves power efficiency, safeguards thermal performance, and ensures stable interaction between firmware, operating system, and onboard hardware components in portable computers.