Abstract
This chapter describes the importance of numerical analysis. Analytical treatment of scientific, or technical problems often yields results that are no, and directly amenable to numerical computation. The result may, for instance, involve the sum of a series the convergence of which may have been established. The analytical result may involve definite integrals, which themselves are defined as limits of sums. The aids for computing practice may be separated into two categories, tables of functions, and technical aids. The tables of functions that are best known are tables of logarithms, and of trigonometric functions. The subdivision is mostly so fine, that for every value of the argument at hand, the value of the function can be looked up directly, or in any case can be obtained by simple linear interpolation. In the tables of functions that are not used so frequently, or in the tables of functions with more than one argument, the subdivision is mostly not so very fine. Technical aids may be subdivided into digital aids and analog aids.
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