The is related to the Intel Management Engine Interface (MEI), which is a hardware-based subsystem found in most Intel chipsets. The Management Engine Interface allows communication between the operating system and the Intel Management Engine (ME), a small, low-power processor embedded within Intel chipsets. The ME provides various system management features, including out-of-band management, security features, and remote diagnostics.

The HECI part refers to the Host Embedded Controller Interface, which is the protocol used for communication between the operating system and the Management Engine.