Establish and maintain baseline configurations and inventories of organizational systems (including hardware, software, firmware, and documentation) throughout the respective system development life cycles.

A documented baseline configuration establishes how a system should be setup. Baseline configurations should be designed based on the principal of least functionality.

Create baseline configurations for each type of system used in your company. This means that you must document how to configure your systems. This includes documenting the default software to be installed on a system and its system settings. You should do this for everything from workstations, to servers, network devices, and printers. Every time you setup a new device use your baseline configuration documentation for reference. You need to implement your established baselines on your systems. Periodically update your baseline configurations to reflect any new operational requirements. Maintain a list of all hardware systems (workstations, servers, network devices, printers etc.) used in your company. Maintain a list of all software used on your systems.