"Five Nines" refers to a reliability standard in the field of information technology and telecommunications, indicating that a system is operational 99.999% of the time. This translates to a maximum allowable downtime of just about 5.26 minutes per year. Achieving this level of reliability is crucial for businesses that rely on continuous service, such as those in the financial or healthcare sectors. The term is often used to describe the performance of data centers, cloud services, and other critical infrastructure. Organizations strive for Five Nines to ensure high availability and customer satisfaction, as even minor outages can lead to significant losses and disruptions.