In a register system in which a plurality of register units including a register and a money settlement device is provided, the plurality of register units includes a base unit and a terminal unit. A money settlement device of the base unit includes a money storing unit arranged in a safe, an interior of which only a person having specific authority is allowed to access. In addition, the base unit is configured to perform a replenishing process and a collecting process with respect to the terminal unit.

Embodiments of systems, methods, and devices for protecting service personnel by deploying a physical barrier are described. Further embodiments describe additional security features such as lights, sirens, cameras, electronic locks, timers, and/or notifying security personnel or local law enforcement when the system is activated.