This reference text discusses principles, design, and applications of various types of multiplier-cum-divider circuits (MCDs), and covers applications of operational amplifiers to perform as MCDs circuits The text covers principles of multiplying circuits, dividing circuits, square rooting, and vector magnitude circuits in detail. It discusses how multiplier-cum-divider circuits are developed with saw tooth and triangular waves. It covers important topics including non-linear op-amp circuits, triangular wave referenced multiplier-cum-divider with multiplexes, saw tooth wave referenced MCD with analog switches, peak responding MCD with analog switches and triangular wave referenced MCD with analog switches. The text will be useful for senior undergraduate, graduate students, and professionals in the fields of electrical engineering, and electronics and communication engineering.