What does the ATA Specification No. 100 divide the aircraft into?

The ATA Specification No. 100 is a widely referenced standard in aviation that organizes aircraft information systematically. It divides the aircraft into systems and subsystems, which allows for a clear structure and organization of data related to various components of an aircraft. This breakdown is crucial for maintenance, operation, and training purposes, as it enables quick identification of issues or components.

By categorizing aircraft systems and subsystems, the ATA Specification No. 100 facilitates the understanding of how each part of the aircraft functions and interacts with other parts. This organization is instrumental for technicians and engineers when performing diagnostics, maintenance, or modifications, as it ensures that all relevant information is efficiently accessible.

The other options represent categories or concepts that do not align with the systematic breakdown established by the ATA Specification No. 100, as it specifically focuses on the functional aspects of the aircraft rather than model numbers, operational facets, or material classifications.