The textbook "Continuous-Time Signals" offers a comprehensive analysis of continuous signals in the context of the course on signals and systems. It addresses the properties of electrical signals used in various applications for the representation, detection, and transmission of information. The systematic presentation of the fundamental principles of signal theory allows readers to become familiar with the signals. A particular focus is placed on the frequency representation of signals through the Fourier transform, with an in-depth examination of the relationship between the spectral density of waveforms and their modulations. The book also covers the energy and power representation of signals as well as their correlation characteristics. Additionally, band-limited and analytic signals are introduced, including methods for their description, transformation, and sampling.