MARK SYKES / SCIENCE PHOTO LIBRARY MARK SYKES / SCIENCE PHOTO LIBRARY
Computer. Simulated X-ray of a vertical processing unit of a computer. The front of the unit (right) contains removable disc drives for data storage. Inside the computer is the motherboard (bottom), which contains electronic circuitry, expansion slots (lower left) and the central processing unit beneath the processor fan (lower right). The rectangular structure at centre left is the power supply unit. The motherboard connects to the disc drives by ribbon cables.
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