Category Nuances for communications_system:

• necessary,
• delicate,
• permanent,
• external,
• essential,
• special,
• optical,
• basic,
• sensitive,
• concurrent,
• complex,
• electronic,
• underwater,
• acoustic,
• fixed,
• over,
• physical,
• civilian,
• major,
• military,
• related,
• new,
• modern,
• local,
• electromechanical,
• ancillary,

Simple Categories for communications_system:

• equipment,
• item,
• object,
• system,
• experience,
• network,
• installation,
• facility,
• device,
• structure,