Power Supply
(n.) Also called a power supply unit or PSU, the component that supplies power to a computer. Most personal computers can be plugged into standard electrical outlets. The power supply then pulls the required amount of electricity and converts the AC current to DC current. It also regulates the voltage to eliminate spikes and surges common in most electrical systems. Not all power supplies, however, do an adequate voltage-regulation job, so a computer is always susceptible to large voltage fluctuations.
Power supplies are rated in terms of the number of watts they generate. The more powerful the computer, the more watts it can provide to components.
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To turn a machine on.
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A characteristic of operators that indicates when they will be evaluated when they appear in complex expressions. Operators with high precedence are evaluated before operators with low precedence. For example, the multiplication operator (*) has higher preference than the addition operator (+), so the expression 2+3*4 equals 14, not 20. You can override precedence rules […]