Category Nuances for collector:

• private,
• recreational,
• thermal,
• industrial,
• bigger,
• marginal,
• major,
• internal,
• solar,
• trusted,
• concerned,
• civilian,
• interested,
• perceived,
• functional,
• special,
• old,
• conventional,

Simple Categories for collector:

• individual,
• item,
• equipment,
• thing,
• system,
• worker,
• hardware,
• entity,
• structure,
• plant,
• owner,
• user,
• unit,
• danger,