The history of optical design has been closely associated with the latest techniques for computation because of the heavy requirements for computation in optical design. The microcomputer revolution is one of the latest stages in this process. We describe the application of one of the most common microcomputers, the TRS-80 (Z80), to the optical design problem. Speeds on the order of five ray-surfaces per second and costs of a few microdollars per ray-surface can be readily achieved. Some currently available programs and forthcoming capabilities are described.