Modular systems are designs made up of separate, interchangeable components or modules. Each module can function independently or work together with others, allowing for flexibility and customization. This approach is commonly used in various fields, including software development, architecture, and manufacturing. The benefits of modular systems include easier maintenance, as individual modules can be replaced or upgraded without affecting the entire system. They also promote scalability, enabling users to add or remove modules based on their needs. This adaptability makes modular systems a popular choice for both personal and professional applications.