Design involves conceiving and creating ideas, and is found in many areas like documents, technology, music, and more. Computer-aided design (CAD) software allows designers to digitally create and edit designs, which is useful for drafting visual representations like technical drawings. Simulations software helps students build mental models of how systems work in areas like science by allowing them to interact with virtual representations. Designing media like music can be done using composition software, which provides tools similar to word processors for organizing and editing creative works.