History and Evolution of CAD
CAD originated in the 1950s with early computer-aided technical drawing systems. Ivan Sutherland's Sketchpad (1963) pioneered graphical interfaces, laying the foundation for modern CAD. By the 1990s, CAD evolved into 3D modeling, with parametric design software like Pro/ENGINEER (Creo) leading the way. Today, CAD integrates with manufacturing and engineering tools, with cloud-based platforms enabling real-time collaboration.