The Codewriting Workbook introduces students and practitioners to basic programming concepts for computer-aided design (CAD). Through a series of guided exercises and examples, readers learn how to develop and write procedures for creating two-dimensional drawings and three-dimensional models using a variety of algorithmic functions. Each exercise begins with a simple concept and evolves into a family of possible solutions. A primer on programming, The Codewriting Workbook presents efficient methods for computing singular results that, when compounded, generate the broadest range of design possibilities. Though exercises are presented in AutoLISP, the workbook outlines general processes for structuring procedures that can be adapted to almost any CAD-based scripting language.