This is actually pretty similar to the NATO system for organising departments - https://en.wikipedia.org/wiki/Staff_(military)#Continental_staff_system https://

This is actually pretty similar to the NATO system for organising departments - https://en.wikipedia.org/wiki/Staff_(military)#Continental_staff_system https://en.wikipedia.org/wiki/Staff_(military)#Continental_s... The officer in charge of operations and plans for a warship can sit in an office with "N3/N5" on the door and everybody in NATO will understand what's going on.