CMOSExplanationCMOS is a general term for the program that stores important system information related to the starting of a computer. Data held in CMOS includes the hard disk type of configuration, the order of boot devices to try, and other configurable settings related to the system hardware. UEFI is firmware that was designed to replace BIOS. The UEFI program controls the startup process of a computer and loads the operating system into memory. Cache is an area of memory that holds recently- accessed data. Random Access Memory (RAM) is a temporary data storage location that can be read from and written to.