To dimension an electronic device, knowledge of circuit technology alone is not sufficient. One must also have a thorough understanding of the properties of the required components, such as resistors, capacitors, transistors, and so on. Such information can only be found in the manufacturers' data sheets or in relevant standards. This technical book discusses the available components, how they function, what the data means, and the scale they operate on. The book provides an introduction to analog circuit simulation using the network analysis program MultiSimBlue and demonstrates through numerous examples how to simulate and explain the characteristic properties from a library of over 100,000 components. This approach enhances the understanding of the operation of the components and circuits being studied.