extended system configuration data (BIOS) (ESCD)
Extended System Configuration Data (ESCD) is configuration data for Plug and Play( PnP) that is stored in the Basic Input/Output System( BIOS) of the computer.
The ESCD data contains information about the PnP device. They are used by the BIOS, which assigns them to the corresponding devices. With every configuration change the ESCD data in the BIOS is updated. For this purpose, the hardware configuration ischecked during booting and configuration changes are entered in the ESCD.