A computer is a lot like the human body. The hard drive is like the hippocampus of a computer, storing long term information, the RAM is like the frontal lobe, storing short term information, the CPU is like the cerebral cortex, which processes information, the GPU is like the eyes, which lets you graphically see things, and the motherboard is like a human body, which connects all the parts together to function. If one of these components or more were missing, they wouldn’t be able to function correctly.
