Abstract: A human resources and payroll system having a plurality of separate modules includes a SQL server or alternative server being able to implement a back end database. In one example, each separate module is designed to be integrated seamlessly into the core payroll system. In another example, each separate module is capable of being controlled by a security management system. In one example, each separate module may be activated or deactivated by the security management system based on the needs or contracted arrangements of a client using the system.