All info goes through the CPU to be processed. The latest CPUs execute many millions of instructions per second. A CPU doesn't have to run a whole computer. There are specialized CPU's made that are explicitly geared to do specific tasks, such as run the electronics in a car, or a VCR, or microwave oven. Is where the information is stored.
Memory is organized in little cubbyholes, each of which needs an address .
The info in RAM is lost when the power is turned off. R ead O nly M emory stores start up and basic operating info. The info in ROM is not lost when the power is turned off. This program tests the computer and makes it ready to start. The BIOS a collection of little programs to run the most basic things in the computer, such as draw a character on the screen, check the memory, read the disk, read the keyboard, etc.