Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet

Narrower term/s

• systems (equipment)[+]
  • system components [NP] [+]
    • electrical system components [+]
      • actuators
      • oscillators
      • transistors
      • electron tubes [+]
      • capacitors
      • electrodes [+]
      • insulators
      • resistors
      • rheostats [+]
      • rheotomes
      • raceways [+]
      • electric cables [+]
      • circuit breakers
      • circuits
      • electric conduits
      • switchboards
      • electric switches
      • electric wiring
      • ground-fault circuit interruptors
      • power outlets
      • panelboards
      • receptacles
      • transformers [+]
      • circuit boards
      • occupancy sensors
      • photovoltaic cells [+]
      • punch blocks (electrical connections)
      • magnetrons
      • [temporary alphabetical list: electrical system components] [+]
    • [plumbing and stormwater system components] [+]
      • leader heads
      • catch basins
      • cesspools
      • cisterns (plumbing components)
      • drains [+]
      • gutters (building drainage components) [+]
      • piping (plumbing system components) [+]
      • plumbing fixtures [+]
      • seepage pits
      • septic tanks
      • sumps
      • traps (plumbing system components) [+]
      • water heaters [+]
      • water storage tanks
      • leaching fields
      • impluvia
      • waterspouts [+]
      • safes (plumbing components)
      • rain barrels
      • [temporary alphabetical list: plumbing and stormwater system components] [+]
      • nāla
    • HVAC components [+]
      • ventilation system components [+]
      • [cooling, heating and humidifying components] [+]
      • heat-distributing units [+]
    • telecommunication systems components [+]
      • television receivers
      • radio receivers
      • telephones [+]
      • transceivers [+]
      • antennas [+]
      • field telephones
      • telephone wires
      • microphones [NP] [+]
      • telegraphs [+]
      • liquid crystal displays
      • remote controls
      • [temporary alphabetical list: telecommunication systems components] [+]
      • fax machines
      • televisions (viewing devices)
    • infrastructural elements [+]
      • dam elements [+]
      • transportation elements [+]
      • utilities components [+]
    • protection system components [+]
      • fire alarm system components [+]
      • fire extinguishing system components [+]
      • security system components [+]
      • [temporary alphabetical list: protection system components] [+]
  • [systems by function] [+]
    • waterworks
    • electrical systems [+]
      • emergency power supply
      • grounded systems
      • electrical system components [NP] [+]
    • conveying systems [+]
      • vertical conveying systems [+]
      • [diagonal and multidirectional conveying systems] [+]
      • horizontal conveying systems [+]
      • [temporary alphabetical list: conveying systems] [+]
    • HVAC [+]
      • heating systems [+]
      • ventilation (systems) [+]
      • air conditioning [+]
      • air cooling [+]
      • HVAC components [NP] [+]
      • [temporary alphabetical list: HVAC] [+]
    • lighting [+]
      • [lighting by method of illumination] [+]
      • [lighting by location or context] [+]
      • [lighting by function] [+]
    • stormwater systems
    • communication systems (mechanical and electrical systems) [+]
      • television antenna systems
      • clock and program systems
      • sound systems [+]
      • NTSC system
    • protection systems [+]
      • fire protection systems [+]
      • security systems [+]
      • protection system components [NP] [+]
    • plumbing systems [+]
      • [plumbing and stormwater system components] [NP] [+]
      • water distribution systems [+]
      • sanitary drainage systems
    • infrastructural systems [+]
      • transit systems (infrastructure) [+]
      • utilities (infrastructures) [+]
      • telecommunication systems [+]
      • drainage systems
      • Internet [+]
    • signage
    • seating [+]
      • icpalli (seat)
    • geographic systems [+]
      • geographic information systems
      • Global Positioning System
      • Electron Marker System
    • film projection systems [+]
      • VistaVision (TM)
    • computer systems [+]
      • information systems [+]
    • digital projection
  • [systems by location or context] [+]
    • building systems [+]
      • mechanical systems
    • home entertainment systems [+]
      • home theaters
• object groupings[+]
  • [object groupings by general context] [+]
    • collections (object groupings) [+]
      • corporate collections
      • private collections (object groupings)
      • fonds (collections)
      • national collections
      • bookstocks
      • permanent collections
      • special collections (object groupings)
      • topical collections
      • art collections
      • public collections
    • series (object groupings) [+]
      • miniature libraries
    • oeuvre
    • editions [+]
      • limited editions
      • editions de luxe
    • sets (groups) [+]
      • place settings
      • pairs
      • desk sets [+]
      • services (sets) [+]
      • toilet sets (grooming sets)
      • kits (sets) [+]
      • accouchement sets
      • ampullae sets
      • dresser sets [NP]
    • multiples [NP]
    • sequences
    • hoards (groupings) [+]
      • treasure-trove [NP]
    • layettes
    • trousseaux
    • components (objects parts) [NP] [+]
      • [components by general context] [+]
      • [components by specific context] [+]
    • accoutrements
    • assemblages (archaeological artifacts)
    • industry (object groupings)
    • volumes (documents by form) [NP]
    • impressions (groupings, publishing)
    • issues (object groupings) [+]
      • back issues
    • archives (groupings) [+]
      • dark archives
      • Web archives
    • libraries (object groupings)
    • groups (archival divisions)
    • subgroups (archival divisions)
    • items (cataloging focus)
    • projects (object groupings)
    • competitions (object groupings)
    • lots (object groupings) [+]
      • auction lots
  • [object groupings by specific context] [+]
    • environments (object groupings) [+]
      • coastal environments
      • aquatic environments [+]
      • microenvironments
      • urban environments
      • underground environments
      • built environments (object groupings)
      • paleoenvironments
    • costume groupings [+]
      • ensembles (costume)
      • outfits
      • armor groupings [+]
      • parures
      • haberdasheries
    • vehicle groupings [+]
      • rolling stock
      • trains (vehicle groupings) [+]
      • convoys
      • fleets
    • container groupings [+]
      • castor sets
      • communion sets [+]
      • water sets
      • toilet sets (washing sets)
      • cruet sets
      • lavabo sets
      • travel medicine kits
      • garnitures (vases)
      • first aid kits
      • baptism sets
    • visual works groupings [+]
      • portfolios (groups of works)
      • narrative cycles [+]
      • print groupings [+]
      • causaṭh Yōginis
      • dēvālaṁkāra
    • furnishings groupings [+]
      • suites (furniture)
      • mantel garnitures [+]
      • [temporary alphabetical list: furnishings groupings] [+]
      • dīpamālā
    • recreational artifact groupings [+]
      • [card, table and board game sets] [+]
      • ball game sets [+]
    • exchange media groupings [+]
      • stamp groupings [+]
    • information artifact groupings [+]
      • files (document groupings) [+]
      • podcast series
      • podcast seasons
    • ceremonial groupings [+]
      • grave goods [NP] [+]
      • funerary bundles [+]
  • [temporary alphabetical list: object groupings] [+]
    • beverage sets
    • condiment set
    • carving sets
    • cup and saucer set
    • decanter sets
    • flatware sets
    • food service sets
    • mayonnaise sets
    • luncheon sets
    • spoon and salt sets
    • sugar and creamer sets
    • tablecloth sets
    • tableware sets
    • salt and pepper sets

Anotations

Scope note:

The Object Groupings and Systems hierarchy contains terms that denote a collective set of objects treated as a unit or an assembly of equipment, and systems intended to perform a specific function (e.g., suites (furniture), castor sets). Relation to other hierarchies: Terms for groupings or systems that are not object-based are found in other hierarchies, such as in the Organizations hierarchy, and under in the People hierarchy.