This paper serves as a tutorial paper for a new area of research in control systems, namely, quantized feedback control and estimation. This area is motivated by the increasing need of incorporating communication networks in a control system. In such a framework, feedback information needs to be transmitted over a digital network, which results in a mumber of new challenges for estimation and control design. The focus of this paper is to introduce a mumber d recent results on the design of quantisets for the purposes of control design and state estimation.uantized feedback control, networked control, quantized estimation, robust control.