The creators of computer viruses are knowledgeable human beings, sadly displaying a sadistic desire to have fun at the cost of serious PC users. Analogue computers do not calculate using numbers. They solve problems by copying or imitating the problems and measuring results. The several parts of an analogue computer initiate different parts of the problem at the same time. For instance, instruments such as the fuel gauge or the altimeter are analogue instruments.
Digital computers make calculations using numbers.
Each calculation is carried out one step at a time. When one step is over, the answer is stored and the next step begins. A chip is made from a very thin flake of a material called silicon. Channels are cut or etched into the silicon, which make a circuit, a kind of pathway along which the electric currents flow. For the chips to carry out different kinds of tasks, different patterns are etched into the silicon.