Interactive systems are computer-based systems designed to facilitate communication between users and technology. They allow users to input data, receive feedback, and engage with the system in real-time. Examples include web applications, video games, and mobile apps, which all rely on user interaction to function effectively. These systems often incorporate elements like user interfaces and feedback mechanisms to enhance the user experience. By responding to user actions, interactive systems can adapt and provide personalized content, making them essential in various fields such as education, entertainment, and business.