Computer-Aided Software Engineering (CASE) refers to the use of software tools to support and automate various software development processes. These tools help developers design, code, test, and maintain software more efficiently. By providing visual modeling, code generation, and project management features, CASE tools streamline workflows and improve collaboration among team members. CASE tools can be categorized into two main types: upper CASE tools, which focus on the early stages of software development like planning and design, and lower CASE tools, which assist in coding and testing. Overall, CASE enhances productivity and quality in software development projects.