What is the oldest and most common technique to differentiate information systems?

The oldest and most common technique to differentiate information systems is the classification based on their primary functions, which typically includes operational, management, and strategic systems. Operational systems support day-to-day activities, management systems aid in decision-making and reporting, and strategic systems assist in long-term planning and competitive advantage. This classification helps organizations understand the purpose and scope of their information systems, facilitating better alignment with business objectives.