This handbook presents topical research in the study of the classification and application of fractals, including extended geometrical and generalised fractals, the relationship between the fractal dimension of nanoporous massive catalysts and their catalytic activity; fractals in environmental engineering; the formation of fractal layers on mercury surfaces; fractals in micro and nanoelectronics; sports performance analysis with fractal dimensions; graph fractaloids and a fractal attractor model in avascular tumour proliferation.