CAD, or Computer-Aided Design, is a technology used by engineers, architects, and designers to create precise drawings and models. It allows users to design in both 2D and 3D, making it easier to visualize and modify their ideas. CAD software can also simulate how a product will function, helping to identify potential issues before physical production. The use of CAD has revolutionized various industries, including construction, automotive, and aerospace. By streamlining the design process, it reduces the time and cost associated with creating prototypes. Additionally, CAD files can be easily shared and collaborated on, enhancing teamwork and communication among professionals.