The ATEN CS84U gives operators direct control over four computers from a single keyboard, mouse, and monitor setup. For teams that still maintain mixed PS/2 and USB environments, that flexibility matters. It reduces peripheral duplication, keeps the desk clear, and makes it easier to move between systems without interrupting the work in front of you. This 4-port KVM switch is a practical fit for infrastructure spaces where local access is the priority. It is designed for straightforward console management rather than remote IP administration, which keeps the workflow simple and predictable. In a server closet, test bench, or technical support station, that simplicity translates into faster response and less overhead. ATEN’s CS84U is the kind of tool that earns value through consistency. It helps standardize access across multiple machines, especially in environments where legacy PS/2 peripherals and USB hardware coexist. For organizations that need reliable local switching without overbuying features they will not use, this model delivers the right balance of control density and operational clarity.