A distributed system is also known as a tightly coupled system.

In a distributed system, the components located on networked computers communicate and coordinate their actions by passing messages. This type of system is characterized by its loose coupling, which means that the different components are relatively independent of each other and can operate autonomously, often across different physical locations.

On the other hand, a tightly coupled system refers to components that are closely interconnected, typically sharing memory and resources, and often requiring synchronization to function effectively. In tightly coupled systems, the components often work together as a single unit, which contrasts sharply with the nature of distributed systems that rely on message passing and may not share a common memory.

Therefore, stating that a distributed system is a tightly coupled system is incorrect, as it fundamentally misrepresents the nature of how distributed systems operate. They exemplify the concept of loose coupling, allowing for flexibility, scalability, and robustness in communication and processing.