CLASSIFICATION NAME	Description
ABORT STATION	A DESIGNATED AREA FOR EMERGENCY STOPS OR INTERRUPTIONS IN OPERATIONS
ACCELERATOR	A DEVICE OR SYSTEM THAT INCREASES THE SPEED OR ENERGY OF PARTICLES OR OBJECTS
ACCESS	THE ABILITY TO REACH OR ENTER A PLACE, TYPICALLY REFERRING TO PATHWAYS, DOORS, OR OTHER ENTRY POINTS
ACCESS PANEL	A REMOVABLE PANEL ALLOWING ACCESS TO COMPONENTS OR AREAS FOR MAINTENANCE OR INSPECTION
AEDS	AUTOMATED EXTERNAL DEFIBRILLATORS, DEVICES USED FOR EMERGENCY TREATMENT OF CARDIAC ARREST
AIR CONDITIONER	A SYSTEM OR DEVICE THAT COOLS AND DEHUMIDIFIES INDOOR AIR FOR COMFORT
AIR CURTAIN	A DEVICE THAT CREATES A BARRIER OF AIR TO SEPARATE DIFFERENT ENVIRONMENTS WHILE ALLOWING EASY PASSAGE
AIR DRYER	A DEVICE THAT REMOVES MOISTURE FROM THE AIR, OFTEN USED IN INDUSTRIAL SETTINGS
AIR HANDLING UNIT	EQUIPMENT USED TO CONDITION AND CIRCULATE AIR AS PART OF AN HVAC SYSTEM
AIR MAINTENANCE DEVICE	EQUIPMENT USED TO MAINTAIN AIR PRESSURE IN A SYSTEM OR ENVIRONMENT
AIR SEPARATOR	A DEVICE THAT REMOVES AIR BUBBLES FROM WATER OR OTHER FLUIDS IN A SYSTEM
ALARM	A SETUP DESIGNED TO DETECT UNAUTHORIZED ENTRY OR EMERGENCIES AND ALERT RELEVANT PARTIES
ALARM ANNUNCIATOR	A DEVICE THAT VISUALLY OR AUDIBLY INDICATES THE STATUS OF AN ALARM SYSTEM
AMBIENT NOISE SYSTEM	EQUIPMENT USED TO MANAGE AND CONTROL BACKGROUND NOISE LEVELS IN AN ENVIRONMENT
AMPLIFIER	AN ELECTRONIC DEVICE THAT INCREASES THE STRENGTH OF AUDIO SIGNALS
ANALOG SCOPE	AN INSTRUMENT USED TO VISUALIZE AND MEASURE ANALOG SIGNALS
ANCHORAGE SYSTEM	A SETUP USED TO SECURE STRUCTURES OR OBJECTS IN PLACE, OFTEN IN CONSTRUCTION
ANODE	THE POSITIVELY CHARGED ELECTRODE IN AN ELECTRICAL DEVICE, WHERE OXIDATION OCCURS
ANTENNA	A DEVICE USED TO TRANSMIT OR RECEIVE ELECTROMAGNETIC WAVES, TYPICALLY FOR COMMUNICATION PURPOSES
ANTENNA CONNECTION PANEL	A PANEL THAT FACILITATES CONNECTIONS FOR MULTIPLE ANTENNA SYSTEMS
ANTENNA CONNECTION PORT	A PORT DESIGNED FOR CONNECTING ANTENNAS TO A SYSTEM
APPLIANCE	A DEVICE OR PIECE OF EQUIPMENT DESIGNED TO PERFORM A SPECIFIC TASK, TYPICALLY USED IN A HOME OR OFFICE SETTING
APRON	A PROTECTIVE OR DECORATIVE PANEL OR COVER, OFTEN USED IN INDUSTRIAL OR CONSTRUCTION SETTINGS
AUDIO INPUT EXPANDER	A DEVICE THAT INCREASES THE NUMBER OF AUDIO INPUT CHANNELS AVAILABLE IN A SYSTEM
AUDIO PANEL	A CONTROL PANEL FOR MANAGING AUDIO INPUTS, OUTPUTS, AND SETTINGS
AUDIO PROCESSOR	A DEVICE THAT MODIFIES AUDIO SIGNALS TO ACHIEVE DESIRED EFFECTS OR QUALITY
AUDIO SIGNAL GENERATOR	A DEVICE THAT PRODUCES AUDIO SIGNALS FOR TESTING OR OPERATIONAL PURPOSES
AUDIO VIDEO SELECTOR	A DEVICE THAT SWITCHES BETWEEN MULTIPLE AUDIO AND VIDEO INPUTS
AUTO DIALER	A DEVICE THAT AUTOMATICALLY DIALS PHONE NUMBERS FOR COMMUNICATION OR ALERT PURPOSES
AUTOMATIC TAG READER (ATR)	A SYSTEM USED TO READ IDENTIFICATION TAGS AUTOMATICALLY, OFTEN USED IN TRACKING OR ACCESS CONTROL
AUXILIARY HARNESS	A SECONDARY OR ADDITIONAL HARNESS USED FOR SECURING OR CONNECTING COMPONENTS
AWNING	A SECONDARY COVERING ATTACHED TO THE EXTERIOR WALL OF A BUILDING, PROVIDING SHADE OR PROTECTION FROM THE ELEMENTS
BACKFLOW PREVENTER	A DEVICE THAT PREVENTS THE REVERSE FLOW OF WATER OR OTHER FLUIDS IN A SYSTEM
BACKUP SWITCH	A SWITCH USED TO ACTIVATE A SECONDARY SYSTEM OR BACKUP POWER SOURCE
BARBED WIRE	WIRE WITH SHARP EDGES OR POINTS, USED FOR FENCING OR SECURITY
BARRIER	A STRUCTURE OR OBJECT THAT PREVENTS OR CONTROLS ACCESS OR MOVEMENT
BASE	THE LOWEST PART OR FOUNDATION OF A STRUCTURE OR OBJECT
BASE STATION	A FIXED COMMUNICATIONS LOCATION THAT SERVES AS A CENTRAL POINT FOR WIRELESS COMMUNICATION
BATTERY	A DEVICE THAT STORES AND PROVIDES ELECTRICAL ENERGY
BATTERY RACK	A STRUCTURE DESIGNED TO HOLD AND ORGANIZE BATTERIES
BEAM	A STRUCTURAL ELEMENT THAT SUPPORTS LOADS, TYPICALLY USED IN CONSTRUCTION
BELT OR CHAIN DRIVE MACHINE	A MACHINE THAT USES BELTS OR CHAINS TO TRANSMIT MECHANICAL POWER
BELT SECTION	A PART OF A BELT SYSTEM, OFTEN USED IN CONVEYORS OR DRIVE SYSTEMS
BHS CONTROL STATION	A CONTROL STATION FOR A BAGGAGE HANDLING SYSTEM
BIOMETRIC READER	A DEVICE THAT IDENTIFIES INDIVIDUALS BASED ON PHYSICAL OR BEHAVIORAL CHARACTERISTICS
BOAT	A VESSEL USED FOR TRANSPORTING PEOPLE OR GOODS ON WATER
BOILER	A DEVICE THAT HEATS WATER OR OTHER FLUIDS TO PRODUCE STEAM OR HOT WATER
BOLLARD	A SHORT, STURDY POST USED TO CONTROL OR DIRECT TRAFFIC, OFTEN FOR SECURITY
BRACING	STRUCTURAL ELEMENTS USED TO PROVIDE SUPPORT AND STABILITY
BRAILLE	A SYSTEM OF RAISED DOTS USED BY VISUALLY IMPAIRED INDIVIDUALS TO READ AND WRITE
BRAKE	A DEVICE FOR SLOWING OR STOPPING A MOVING VEHICLE, TYPICALLY BY APPLYING PRESSURE TO THE WHEELS
BUFFER	A DEVICE OR SUBSTANCE THAT REDUCES SHOCK OR IMPACT, OFTEN USED IN MECHANICAL SYSTEMS
BUILDING GROUND	THE ELECTRICAL GROUND FOR A BUILDING, ENSURING SAFETY BY PREVENTING ELECTRICAL HAZARDS
BULKHEAD	A DIVIDING WALL OR BARRIER BETWEEN COMPARTMENTS IN A SHIP, AIRCRAFT, OR BUILDING
BUMPER	A PROTECTIVE BARRIER OR CUSHION DESIGNED TO ABSORB IMPACT AND PREVENT DAMAGE
BUMPER BLOCK	A SOLID BLOCK DESIGNED TO ABSORB IMPACT AND PREVENT DAMAGE IN INDUSTRIAL SETTINGS
BURNER ASSEMBLY	THE COMPONENT OF A FURNACE OR BOILER WHERE FUEL IS BURNED TO PRODUCE HEAT
BUS DUCT	A DUCT THAT HOUSES ELECTRICAL BUS BARS FOR DISTRIBUTING POWER
BUSSED CROSS-CONNECT PANEL	A PANEL USED TO INTERCONNECT MULTIPLE ELECTRICAL CIRCUITS
BYPASS SWITCH	A SWITCH THAT ALLOWS A CIRCUIT TO BE BYPASSED OR ISOLATED FOR MAINTENANCE OR TESTING
CABINET	A STORAGE UNIT WITH DOORS AND SHELVES, OFTEN USED FOR ORGANIZING EQUIPMENT OR SUPPLIES
CABLE FEEDER	A CABLE THAT SUPPLIES ELECTRICAL POWER OR SIGNALS TO A SYSTEM OR DEVICE
CABLE TESTER	A DEVICE USED TO TEST THE INTEGRITY AND FUNCTIONALITY OF ELECTRICAL CABLES
CAISSON	A WATERTIGHT STRUCTURE USED IN CONSTRUCTION WORK UNDERWATER OR AS A FOUNDATION
CAMERA	A DEVICE FOR CAPTURING IMAGES OR VIDEOS
CAMERA ENCLOSURE	A PROTECTIVE HOUSING FOR A CAMERA, TYPICALLY USED IN OUTDOOR OR HAZARDOUS ENVIRONMENTS
CANOPY	AN OVERHEAD STRUCTURE THAT PROVIDES SHADE OR SHELTER
CAP	A COVER OR SEAL FOR THE END OF A PIPE, BOTTLE, OR OTHER CONTAINER
CAPACITOR	AN ELECTRONIC COMPONENT THAT STORES AND RELEASES ELECTRICAL ENERGY
CAPACITOR BANK ASSEMBLY	A GROUP OF CAPACITORS USED TOGETHER TO IMPROVE POWER QUALITY OR PERFORMANCE IN AN ELECTRICAL SYSTEM
CAR ENCLOSURE	THE ENCLOSED COMPARTMENT OF AN ELEVATOR OR OTHER TRANSPORT VEHICLE
CAR FIXTURE	A FIXTURE OR FITTING INSIDE AN ELEVATOR CAR, SUCH AS BUTTONS OR HANDRAILS
CAR HANDRAIL	A RAIL INSTALLED INSIDE AN ELEVATOR CAR FOR PASSENGER SAFETY AND SUPPORT
CAR TOP	THE ROOF OF AN ELEVATOR CAR
CARD CAGE	A FRAME OR ENCLOSURE USED TO HOLD AND ORGANIZE CIRCUIT BOARDS OR CARDS
CARD READER	A DEVICE THAT READS DATA FROM CARDS, SUCH AS ID CARDS OR CREDIT CARDS
CATCH BASIN	A RECEPTACLE FOR CATCHING AND RETAINING WATER, TYPICALLY USED IN DRAINAGE SYSTEMS
CATHODIC PROTECTION	A TECHNIQUE USED TO PREVENT CORROSION OF METAL SURFACES BY MAKING THEM THE CATHODE OF AN ELECTROCHEMICAL CELL
CCTV	CLOSED-CIRCUIT TELEVISION, A SYSTEM FOR MONITORING AND RECORDING ACTIVITY IN A SPECIFIC AREA
CEILING	THE OVERHEAD INTERIOR SURFACE OF A ROOM
CEILING SUSPENSION	A SYSTEM USED TO SUPPORT AND SUSPEND A CEILING FROM THE STRUCTURE ABOVE
CENTRAL EXCHANGE UNIT	A CENTRAL HUB FOR MANAGING AND ROUTING COMMUNICATIONS OR DATA
CHAIN	A SERIES OF LINKED METAL RINGS USED FOR FASTENING OR SECURING OBJECTS
CHARGER	A DEVICE THAT SUPPLIES ELECTRICAL ENERGY TO RECHARGE BATTERIES
CHASSIS	THE FRAME OR STRUCTURE OF A VEHICLE OR ELECTRONIC DEVICE
CHEMICAL FEEDER	A DEVICE USED TO DISPENSE CHEMICALS INTO A SYSTEM, SUCH AS A WATER TREATMENT PLANT
CHEMICAL TREATMENT	THE PROCESS OF ADDING CHEMICALS TO A SYSTEM FOR PURIFICATION OR OTHER PURPOSES
CHILLER	A MACHINE THAT REMOVES HEAT FROM A LIQUID, TYPICALLY USED IN AIR CONDITIONING AND INDUSTRIAL PROCESSES
CHUTE	AN INCLINED CHANNEL OR SLIDE FOR CONVEYING MATERIALS
CIRCUIT BREAKER PANEL	A PANEL THAT HOUSES CIRCUIT BREAKERS FOR PROTECTING ELECTRICAL CIRCUITS
CIRCULATOR	A DEVICE THAT MOVES FLUID IN A CLOSED CIRCUIT, OFTEN USED IN HEATING AND COOLING SYSTEMS
CLEAT	A METAL OR WOOD FITTING ON WHICH A ROPE CAN BE FASTENED
CLOCK DISTRIBUTION AMPLIFIER	A DEVICE THAT AMPLIFIES AND DISTRIBUTES CLOCK SIGNALS TO MULTIPLE DEVICES
COLUMN	A VERTICAL STRUCTURAL ELEMENT THAT SUPPORTS LOADS
COMBINER	A DEVICE THAT COMBINES SIGNALS FROM MULTIPLE SOURCES INTO A SINGLE OUTPUT
COMMUNICATION DEVICE	AN ELECTRONIC DEVICE USED FOR TRANSMITTING AND RECEIVING INFORMATION
COMMUNICATION EQUIPMENT	HARDWARE USED TO FACILITATE COMMUNICATION, SUCH AS ROUTERS, SWITCHES, AND MODEMS
COMMUNICATION INTERFACE MODULE	A MODULE THAT PROVIDES CONNECTIVITY BETWEEN DIFFERENT COMMUNICATION SYSTEMS
COMMUNICATIONS SERVICE MONITOR	A DEVICE THAT MONITORS AND ANALYZES COMMUNICATION SERVICE QUALITY
COMPACTOR	A MACHINE USED TO COMPRESS MATERIALS TO REDUCE THEIR VOLUME, OFTEN USED IN WASTE MANAGEMENT
COMPRESSOR	A MACHINE THAT INCREASES THE PRESSURE OF A GAS BY REDUCING ITS VOLUME, COMMONLY USED IN REFRIGERATION AND AIR CONDITIONING
COMPRESSOR LIMITER	A DEVICE USED TO CONTROL THE OUTPUT PRESSURE OF A COMPRESSOR, PREVENTING IT FROM EXCEEDING A SPECIFIED LIMIT
COMPUTER	AN ELECTRONIC DEVICE FOR STORING AND PROCESSING DATA, TYPICALLY IN BINARY FORM, ACCORDING TO INSTRUCTIONS GIVEN TO IT IN A VARIABLE PROGRAM
COMPUTER BOARD	A PRINTED CIRCUIT BOARD (PCB) THAT SERVES AS THE BACKBONE FOR COMPUTERS AND OTHER ELECTRONICS, CONTAINING THE PRINCIPAL COMPONENTS OF THE SYSTEM
CONDENSATE RETURN UNIT	A SYSTEM THAT COLLECTS AND RETURNS CONDENSATE FROM STEAM TRAPS TO THE BOILER FEEDWATER SYSTEM
CONDENSER	A DEVICE OR UNIT USED TO CONDENSE A GASEOUS SUBSTANCE INTO A LIQUID STATE THROUGH COOLING
CONFLICT MONITOR UNIT	A DEVICE THAT DETECTS AND LOGS CONFLICTS IN A TRAFFIC SIGNAL SYSTEM TO ENSURE SAFE OPERATION
CONNECTION	THE POINT AT WHICH TWO OR MORE ELEMENTS ARE JOINED TOGETHER IN A SYSTEM
CONSOLE	A PANEL OR UNIT ACCOMMODATING THE CONTROLS FOR ELECTRONIC OR MECHANICAL EQUIPMENT
CONTAINMENT BOOM	A TEMPORARY FLOATING BARRIER USED TO CONTAIN AN OIL SPILL
CONTROL JOINT	A JOINT THAT IS INTENTIONALLY CREATED TO CONTROL THE LOCATION OF CRACKS IN CONCRETE STRUCTURES
CONTROL PANEL	A FLAT, OFTEN VERTICAL, AREA WHERE CONTROL OR MONITORING INSTRUMENTS ARE DISPLAYED
CONTROL STATION	A LOCATION EQUIPPED WITH CONTROL PANELS FOR OPERATING AND MONITORING EQUIPMENT OR SYSTEMS
CONTROL SYSTEM	A SYSTEM OF DEVICES OR SET OF DEVICES THAT MANAGES, COMMANDS, DIRECTS, OR REGULATES THE BEHAVIOR OF OTHER DEVICES OR SYSTEMS
CONTROLLER	A DEVICE OR GROUP OF DEVICES THAT MANAGES THE OPERATIONS OF A MACHINE OR SYSTEM
CONTROLLER ROOM	A ROOM WHERE THE CONTROLLERS AND CONTROL SYSTEMS FOR VARIOUS EQUIPMENT OR PROCESSES ARE HOUSED
CONVERTER	A DEVICE THAT CONVERTS ONE FORM OF ENERGY OR SIGNAL INTO ANOTHER
COOLER	A DEVICE OR SYSTEM USED TO COOL AIR, LIQUIDS, OR SURFACES
COOLING TOWER	A STRUCTURE THAT REMOVES HEAT FROM WATER BY EVAPORATIVE COOLING
COUNTERWEIGHT	A WEIGHT USED TO BALANCE ANOTHER WEIGHT, TYPICALLY IN ELEVATORS OR MECHANICAL SYSTEMS
COUPLER	A DEVICE USED TO CONNECT TWO SHAFTS TOGETHER AT THEIR ENDS TO TRANSMIT POWER
CROSSING ASSEMBLY	A STRUCTURE OR SYSTEM THAT ALLOWS FOR THE SAFE CROSSING OF PEDESTRIANS OR VEHICLES AT DESIGNATED POINTS
CROSSWALK	A MARKED PART OF A ROAD WHERE PEDESTRIANS HAVE THE RIGHT OF WAY TO CROSS
CURB	A RAISED EDGE OR BORDER ALONG THE SIDE OF A ROAD OR PAVEMENT
CURB SYSTEM	A SYSTEM THAT INCLUDES CURBS, GUTTERS, AND ASSOCIATED DRAINAGE COMPONENTS
DAMPER	A DEVICE USED TO REGULATE THE FLOW OF AIR OR GAS
DATA GATHERING PANEL	A PANEL THAT COLLECTS AND ORGANIZES DATA FROM VARIOUS SENSORS OR DEVICES
DATA TRANSLATOR	A DEVICE OR SOFTWARE THAT CONVERTS DATA FROM ONE FORMAT TO ANOTHER
DEARATOR	A DEVICE THAT REMOVES DISSOLVED GASES FROM LIQUIDS, COMMONLY USED IN WATER TREATMENT SYSTEMS
DECK	A FLAT SURFACE OR PLATFORM, TYPICALLY EXTENDING FROM A BUILDING OR USED IN TRANSPORTATION VEHICLES
DECK JOINT	A JOINT BETWEEN SECTIONS OF A DECK TO ALLOW FOR MOVEMENT OR EXPANSION
DECOUPLING MODULE	A DEVICE USED TO ISOLATE OR SEPARATE COMPONENTS IN A SYSTEM TO PREVENT INTERFERENCE OR INTERACTION
DEHUMIDIFIER	A DEVICE THAT REMOVES MOISTURE FROM THE AIR IN A ROOM OR BUILDING
DEHYDRATOR	A DEVICE THAT REMOVES MOISTURE FROM FOOD OR OTHER SUBSTANCES TO PRESERVE THEM
DELINEATOR GUIDE POST	A POST USED TO MARK THE EDGE OF A ROADWAY OR PATH, TYPICALLY WITH REFLECTIVE MATERIAL FOR VISIBILITY
DERAIL	A DEVICE USED TO PREVENT RAILWAY VEHICLES FROM ACCIDENTALLY MOVING PAST A CERTAIN POINT
DESK SET	A SET OF COORDINATED OFFICE ACCESSORIES, OFTEN INCLUDING ITEMS LIKE A PEN HOLDER, PAPER TRAY, AND CALENDAR
DESKTOP HOUSING	AN ENCLOSURE THAT HOUSES DESKTOP COMPUTER COMPONENTS
DETECTOR MODULE	A COMPONENT USED IN A SYSTEM TO DETECT SPECIFIC CONDITIONS OR SUBSTANCES
DETECTOR PORT MASTER MODULE	A CENTRAL MODULE THAT MANAGES MULTIPLE DETECTOR PORTS IN A SYSTEM
DIAGONAL	A LINE OR STRUCTURE THAT RUNS AT AN ANGLE TO THE MAIN LINES OR STRUCTURES
DIGITAL CROSS-CONNECT	A DEVICE USED IN TELECOMMUNICATIONS TO MANAGE THE CONNECTION OF DIGITAL SIGNALS
DISPLAY	A SCREEN OR OTHER SURFACE USED TO SHOW INFORMATION VISUALLY
DIVERTER	A DEVICE USED TO CHANGE THE DIRECTION OF FLOW IN A SYSTEM
DMS CABINET	A CABINET THAT HOUSES A DYNAMIC MESSAGE SIGN (DMS) SYSTEM FOR DISPLAYING VARIABLE MESSAGES TO THE PUBLIC
DOCK	A PLATFORM FOR LOADING AND UNLOADING GOODS FROM VEHICLES OR SHIPS
DOLPHIN	A STRUCTURE USED IN MARINE ENVIRONMENTS TO MOOR VESSELS
DOOR	A HINGED, SLIDING, OR REVOLVING BARRIER AT THE ENTRANCE TO A BUILDING, ROOM, OR VEHICLE
DOOR CLOSER	A DEVICE THAT AUTOMATICALLY CLOSES A DOOR AFTER IT HAS BEEN OPENED
DOOR CONTACT	A SWITCH THAT DETECTS WHETHER A DOOR IS OPEN OR CLOSED
DOOR HOLD OPEN DEVICE	A DEVICE THAT HOLDS A DOOR OPEN UNTIL RELEASED
DOOR PANEL	THE MAIN COMPONENT OF A DOOR THAT SWINGS OR SLIDES TO CLOSE AN OPENING
DOOR STRIKE	THE METAL PLATE OR ASSEMBLY INSTALLED IN A DOOR FRAME THAT ENGAGES WITH THE LOCK BOLT
DRAIN	A CONDUIT OR CHANNEL FOR REMOVING LIQUID WASTE OR RAINWATER
DRUM DRIP	A DEVICE USED IN FIRE SPRINKLER SYSTEMS TO COLLECT AND REMOVE CONDENSATION FROM DRY PIPE SYSTEMS
DUAL READER INTERFACE	AN INTERFACE THAT SUPPORTS TWO READERS FOR ACCESS CONTROL SYSTEMS
DUMPSTER	A LARGE CONTAINER FOR WASTE, TYPICALLY USED FOR COMMERCIAL OR INDUSTRIAL WASTE COLLECTION
DUPLEXER	A DEVICE THAT ALLOWS BI-DIRECTIONAL COMMUNICATION OVER A SINGLE PATH
DUST COLLECTION SYSTEM	A SYSTEM USED TO CAPTURE AND REMOVE DUST FROM THE AIR IN INDUSTRIAL SETTINGS
DVR	DIGITAL VIDEO RECORDER, A DEVICE THAT RECORDS VIDEO IN DIGITAL FORMAT
DYNAMIC MESSAGE SIGN (DMS)	AN ELECTRONIC SIGN USED TO DISPLAY VARIABLE MESSAGES TO THE PUBLIC
EDGE BEAM	A BEAM THAT FORMS THE EDGE OF A STRUCTURE OR SUPPORTS AN OVERHANGING PART
ELECTRICAL INSTALLATION	THE COMPLETE SYSTEM OF ELECTRICAL WIRING, FIXTURES, AND EQUIPMENT INSTALLED IN A BUILDING OR STRUCTURE
ELEVATOR CAR	THE COMPARTMENT IN AN ELEVATOR THAT CARRIES PASSENGERS OR GOODS
ELEVATOR GUIDE RAIL	THE RAILS AND ASSOCIATED HARDWARE THAT GUIDE THE ELEVATOR CAR ALONG ITS PATH
ELEVATOR PHONE	A COMMUNICATION SYSTEM THAT ALLOWS PASSENGERS TO COMMUNICATE WITH OPERATORS WITHOUT USING THEIR HANDS
ELEVATOR PIT	THE AREA BELOW THE LOWEST LANDING OF AN ELEVATOR SHAFT
ELEVATOR ROPE	THE ROPES OR CABLES USED TO LIFT AND LOWER THE ELEVATOR CAR
ELEVATOR SAFETY	SYSTEMS AND DEVICES THAT ENSURE THE SAFE OPERATION OF ELEVATORS
EMERGENCY DETECTOR	A DEVICE THAT DETECTS EMERGENCY CONDITIONS, SUCH AS SMOKE OR FIRE
EMERGENCY LIGHTING	BATTERY-BACKED LIGHTING THAT ACTIVATES DURING A POWER OUTAGE
EMERGENCY POWER OFF	A SWITCH OR SYSTEM THAT CUTS OFF POWER DURING AN EMERGENCY
ENCODER DECODER	DEVICES USED TO ENCODE AND DECODE SIGNALS FOR TRANSMISSION
END OF LINE BOARD	A TERMINATION BOARD USED AT THE END OF A COMMUNICATION LINE
END POINT	THE FINAL DESTINATION OF A DATA OR SIGNAL TRANSMISSION
EQUALIZER	A DEVICE USED TO ADJUST THE BALANCE BETWEEN DIFFERENT FREQUENCIES IN AN AUDIO SIGNAL
EQUIPMENT CABINET	A CABINET USED TO HOUSE AND PROTECT EQUIPMENT
EQUIPMENT SUSPENSION	SYSTEMS OR DEVICES USED TO HANG EQUIPMENT FROM CEILINGS OR OTHER STRUCTURES
ESCALATOR	A MOVING STAIRCASE USED TO TRANSPORT PEOPLE BETWEEN FLOORS
EV CHARGING STATION	A FACILITY WHERE ELECTRIC VEHICLES CAN BE CHARGED
EVACUATION CHAIR	A CHAIR DESIGNED TO ASSIST IN THE EVACUATION OF INDIVIDUALS WITH MOBILITY ISSUES
EVAPORATOR	A DEVICE THAT TURNS LIQUID INTO VAPOR, COMMONLY USED IN COOLING SYSTEMS
EXPANSION ISOLATION JOINT	A JOINT THAT ALLOWS FOR MOVEMENT AND EXPANSION IN STRUCTURES WHILE ISOLATING SECTIONS FROM ONE ANOTHER
EXPANSION JOINT	A JOINT THAT ALLOWS FOR THE EXPANSION AND CONTRACTION OF MATERIALS DUE TO TEMPERATURE CHANGES
FALL PROTECTION SYSTEM	EQUIPMENT AND SYSTEMS DESIGNED TO PROTECT WORKERS FROM FALLING
FAN	A DEVICE THAT MOVES AIR OR GAS TO CREATE AIRFLOW
FAN COIL UNIT	A DEVICE CONSISTING OF A HEATING OR COOLING COIL AND FAN, USED TO CONTROL THE TEMPERATURE IN A SPACE
FD CONNECTION	A CONNECTION POINT FOR FIRE DEPARTMENT EQUIPMENT, TYPICALLY FOUND ON FIRE SUPPRESSION SYSTEMS
FENCING	A BARRIER OR STRUCTURE USED TO ENCLOSE OR SEPARATE AREAS
FENDER PANEL	A PROTECTIVE PANEL USED ON VEHICLES OR STRUCTURES TO PREVENT DAMAGE FROM IMPACT
FIBER OPTIC	A TECHNOLOGY THAT USES GLASS OR PLASTIC THREADS TO TRANSMIT DATA AS LIGHT SIGNALS
FIBER OPTIC PATCH PANEL	A PANEL USED TO CONNECT AND MANAGE FIBER OPTIC CABLES
FILTER BANK	A SET OF FILTERS USED TO REMOVE IMPURITIES FROM AIR, WATER, OR OTHER SUBSTANCES
FILTER UNIT	A DEVICE USED TO REMOVE IMPURITIES FROM A FLUID OR GAS
FILTRATION SYSTEM	A SYSTEM DESIGNED TO REMOVE PARTICLES AND CONTAMINANTS FROM FLUIDS OR GASES
FIRE ALARM POWER SUPPLY	THE POWER SOURCE FOR A FIRE ALARM SYSTEM
FIRE EXTINGUISHER	A PORTABLE DEVICE THAT DISCHARGES A JET OF WATER, FOAM, GAS, OR OTHER MATERIAL TO EXTINGUISH A FIRE
FIRE HOSE RACK	A RACK USED TO STORE FIRE HOSES
FIRE HYDRANT	A VALVE WITH A NOZZLE FOR CONNECTING A FIRE HOSE TO A WATER SUPPLY
FIRE SHUTTER	A BARRIER DESIGNED TO CLOSE AUTOMATICALLY IN THE EVENT OF A FIRE TO PREVENT THE SPREAD OF FLAMES AND SMOKE
FIXED STRUCTURE	A STRUCTURE THAT IS PERMANENTLY FIXED IN PLACE AND NOT INTENDED TO BE MOVED
FLASH RELAY	AN ELECTRICAL RELAY USED TO CONTROL THE FLASHING OF LIGHTS, SUCH AS TRAFFIC SIGNALS
FLASHER	A DEVICE THAT CAUSES LIGHTS TO FLASH ON AND OFF, TYPICALLY USED IN WARNING SYSTEMS OR INDICATORS
FLOATING DOCK	A PLATFORM SUPPORTED BY PONTOONS, USED AS A DOCK THAT RISES AND FALLS WITH THE WATER LEVEL
FLOOR	THE BOTTOM SURFACE OF A ROOM ON WHICH ONE WALKS
FLOOR DECKING	THE STRUCTURAL COMPONENT OF A FLOOR, PROVIDING SUPPORT AND STABILITY
FOUNDATION	THE LOWEST LOAD-BEARING PART OF A BUILDING, TYPICALLY BELOW GROUND LEVEL
FREQUENCY ANALYZER	AN INSTRUMENT USED TO MEASURE THE FREQUENCY COMPONENTS OF A SIGNAL
FREQUENCY GENERATOR	A DEVICE THAT GENERATES A RANGE OF FREQUENCIES FOR TESTING AND CALIBRATION PURPOSES
FUEL FILTER	A DEVICE THAT REMOVES CONTAMINANTS FROM FUEL BEFORE IT REACHES THE ENGINE
FURNITURE	MOVEABLE ARTICLES THAT ARE USED TO MAKE A ROOM OR BUILDING SUITABLE FOR LIVING OR WORKING
FUSE	A SAFETY DEVICE CONSISTING OF A STRIP OF WIRE THAT MELTS AND BREAKS AN ELECTRIC CIRCUIT IF THE CURRENT EXCEEDS A SAFE LEVEL
FUSE DISTRIBUTION PANEL	A PANEL THAT DISTRIBUTES ELECTRICAL POWER THROUGH MULTIPLE FUSES TO PROTECT CIRCUITS
FUSION SPLICER	A DEVICE USED TO JOIN TWO OPTICAL FIBERS END-TO-END USING HEAT
GARDEN	A PLOT OF GROUND WHERE PLANTS SUCH AS FLOWERS, VEGETABLES, OR HERBS ARE CULTIVATED
GAS DETECTION SYSTEM	A SYSTEM DESIGNED TO DETECT THE PRESENCE OF GASES WITHIN AN AREA, OFTEN AS PART OF A SAFETY SYSTEM
GATE	A HINGED BARRIER USED TO CLOSE AN OPENING IN A WALL, FENCE, OR HEDGE
GAUGE	AN INSTRUMENT FOR MEASURING AND INDICATING A QUANTITY SUCH AS THE THICKNESS OF WIRE OR THE AMOUNT OF RAIN, ETC
GENERATOR	A DEVICE THAT CONVERTS MECHANICAL ENERGY INTO ELECTRICAL ENERGY
GFCI RECEPTACLE	GROUND FAULT CIRCUIT INTERRUPTER, AN ELECTRICAL OUTLET DESIGNED TO PROTECT AGAINST ELECTRICAL SHOCK BY BREAKING THE CIRCUIT WHEN THERE IS A DIFFERENCE IN THE CURRENTS IN THE HOT AND NEUTRAL WIRES
GIRDER	A LARGE IRON OR STEEL BEAM OR COMPOUND STRUCTURE USED FOR BUILDING BRIDGES AND THE FRAMEWORK OF LARGE BUILDINGS
GIRDER DIAPHRAGM	A STRUCTURAL COMPONENT THAT PROVIDES LATERAL SUPPORT TO A GIRDER
GOVERNOR	A DEVICE USED TO REGULATE THE SPEED OF A MACHINE, SUCH AS AN ENGINE
GOVERNOR ROPE	A ROPE USED IN CONJUNCTION WITH A GOVERNOR TO CONTROL THE SPEED OF AN ELEVATOR
GPS CLOCK	A CLOCK THAT USES SIGNALS FROM GPS SATELLITES TO PROVIDE PRECISE TIME
GPS OSCILLATOR	A DEVICE THAT PROVIDES A STABLE FREQUENCY OUTPUT USING SIGNALS FROM GPS SATELLITES
GPS SPLITTER	A DEVICE THAT SPLITS A GPS SIGNAL TO MULTIPLE OUTPUTS
GPS TRANSMITTER	A DEVICE THAT SENDS OUT GPS SIGNALS TO BE RECEIVED BY GPS RECEIVERS
GRAVITY VENTILATOR	A DEVICE THAT USES NATURAL CONVECTION TO VENTILATE A SPACE WITHOUT MECHANICAL ASSISTANCE
GREEN ROOF	A ROOF COVERED WITH VEGETATION AND SOIL, OR A GROWING MEDIUM, PLANTED OVER A WATERPROOFING MEMBRANE
GRINDER	A MACHINE OR TOOL THAT GRINDS DOWN MATERIAL, SUCH AS METAL OR CONCRETE
GROUND POWER UNIT	A PORTABLE DEVICE THAT SUPPLIES ELECTRICAL POWER TO AN AIRCRAFT ON THE GROUND
GUARD	A DEVICE THAT ENSURES THE SAFETY AND PROTECTION OF PEOPLE OR PROPERTY.
GUARD RAIL	A SAFETY BARRIER DESIGNED TO PREVENT VEHICLES FROM VEERING OFF THE ROAD
GUIS	NEED MORE INFORMATION
HALL FIXTURE	A LIGHTING OR CONTROL FIXTURE INSTALLED IN A HALLWAY
HALL STATION	A CONTROL PANEL LOCATED IN A HALLWAY, OFTEN USED FOR ELEVATORS
HAND DRYER	AN ELECTRIC DEVICE FOR DRYING HANDS, TYPICALLY FOUND IN PUBLIC RESTROOMS
HANDRAIL	A RAIL FIXED TO POSTS OR A WALL FOR PEOPLE TO HOLD ON TO FOR SUPPORT
HAR ALERT SIGN	HIGHWAY ADVISORY RADIO ALERT SIGN, USED TO INFORM DRIVERS OF EMERGENCY INFORMATION
HAZMAT CLEAN UP EQUIPMENT	EQUIPMENT USED TO CLEAN UP HAZARDOUS MATERIALS
HDD ARRAY STORAGE	A STORAGE SYSTEM CONSISTING OF MULTIPLE HARD DISK DRIVES
HEAT EXCHANGER	A DEVICE USED TO TRANSFER HEAT BETWEEN TWO OR MORE FLUIDS
HEAT PUMP	A DEVICE THAT TRANSFERS HEAT ENERGY FROM A SOURCE OF HEAT TO A HEAT SINK
HEAT TRACE	A SYSTEM USED TO MAINTAIN OR RAISE THE TEMPERATURE OF PIPES AND VESSELS
HEATING COIL	A COIL USED TO GENERATE HEAT IN A HEATING SYSTEM
HEATING UNIT	A DEVICE OR SYSTEM USED TO PROVIDE HEAT TO A SPACE
HIGH POINT VENT	A VENT LOCATED AT THE HIGHEST POINT OF A SYSTEM TO RELEASE TRAPPED AIR
HIGHWAY ADVISORY RADIO	A SYSTEM THAT BROADCASTS TRAVEL INFORMATION TO DRIVERS ON A SPECIFIC RADIO FREQUENCY
HOIST	A DEVICE USED FOR LIFTING OR LOWERING A LOAD BY MEANS OF A DRUM OR LIFT-WHEEL AROUND WHICH ROPE OR CHAIN WRAPS
HOISTWAY OUTSIDE	THE EXTERIOR PART OF AN ELEVATOR SHAFT
HOISTWAY PIT	THE AREA AT THE BOTTOM OF AN ELEVATOR SHAFT
HOLDUP ALARM SYSTEM	A SECURITY SYSTEM DESIGNED TO ALERT AUTHORITIES IN THE EVENT OF A ROBBERY OR EMERGENCY
HOSE	A FLEXIBLE TUBE USED TO CONVEY LIQUIDS OR GASES
HOT WATER HEATER	A DEVICE USED TO HEAT WATER FOR DOMESTIC OR INDUSTRIAL USE
HUMIDIFIER	A DEVICE THAT ADDS MOISTURE TO THE AIR TO PREVENT DRYNESS
HUT	A SMALL, SIMPLE BUILDING, TYPICALLY ONE CONSISTING OF ONE ROOM
HYDRANT PIT	A PIT HOUSING A HYDRANT, TYPICALLY FOR WATER SUPPLY
ICE MAKER	A MACHINE FOR MAKING ICE, TYPICALLY USED IN COMMERCIAL SETTINGS
IMPACT ATTENUATOR	A DEVICE DESIGNED TO ABSORB THE IMPACT OF A VEHICLE COLLISION
INSULATION	MATERIAL USED TO PREVENT THE PASSAGE OF HEAT, SOUND, OR ELECTRICITY
INTERCOM	AN ELECTRONIC COMMUNICATION SYSTEM WITHIN A BUILDING OR GROUP OF BUILDINGS
INTERFACE MODULE	A MODULE THAT ALLOWS DIFFERENT SYSTEMS OR DEVICES TO COMMUNICATE WITH EACH OTHER
INTERIOR	NEED MORE INFORMATION
IRRIGATION SYSTEM	A SYSTEM USED TO SUPPLY WATER TO PLANTS AT REGULAR INTERVALS
IT ENCLOSURE	A PROTECTIVE ENCLOSURE FOR HOUSING IT EQUIPMENT
JOIST	A LENGTH OF TIMBER OR STEEL SUPPORTING PART OF THE STRUCTURE OF A BUILDING
KIOSK	A SMALL, OPEN-FRONTED HUT OR CUBICLE FROM WHICH NEWSPAPERS, REFRESHMENTS, TICKETS, ETC., ARE SOLD
LADDER	A STRUCTURE CONSISTING OF A SERIES OF BARS OR STEPS BETWEEN TWO UPRIGHT LENGTHS OF WOOD, METAL, OR ROPE, USED FOR CLIMBING UP OR DOWN
LANDING	A FLAT AREA AT THE TOP OF A FLIGHT OF STAIRS OR BETWEEN FLIGHTS OF STAIRS
LANE USE CONTROL SIGNAL	A SIGNAL USED TO CONTROL THE DIRECTION OF TRAFFIC FLOW IN SPECIFIC LANES
LAVATORY	A ROOM OR COMPARTMENT WITH A TOILET AND SINK; A BATHROOM
LAWN	AN AREA OF SHORT, REGULARLY MOWN GRASS IN A YARD, GARDEN, OR PARK
LEAK DETECTION SYSTEM	A SYSTEM DESIGNED TO DETECT LEAKS IN A FLUID OR GAS SYSTEM
LEVEL INDICATOR	A DEVICE USED TO MEASURE THE LEVEL OF A SUBSTANCE IN A CONTAINER
LICENSE PLATE READER	A DEVICE USED TO CAPTURE AND ANALYZE LICENSE PLATE INFORMATION
LIFT NET INTERFACE	AN INTERFACE USED TO CONTROL THE OPERATION OF A LIFT OR ELEVATOR
LIGHT CURTAIN	A PRESENCE-SENSING DEVICE USED FOR MACHINE SAFEGUARDING
LIGHT FIXTURE	A COMPLETE LIGHTING UNIT, INCLUDING THE LIGHT SOURCE, HOUSING, AND ELECTRICAL COMPONENTS
LIGHTING	THE ARRANGEMENT OR EFFECT OF LIGHTS IN A SPACE
LIGHTING PANEL	A PANEL USED TO CONTROL LIGHTING CIRCUITS
LINEAR	ARRANGED IN OR EXTENDING ALONG A STRAIGHT OR NEARLY STRAIGHT LINE
LOAD BANK	A DEVICE USED TO SIMULATE ELECTRICAL LOADS FOR TESTING POWER SOURCES
LOAD SWITCH	A SWITCH USED TO CONTROL THE FLOW OF ELECTRICAL POWER TO A LOAD
LOCAL NETWORK	A NETWORK THAT CONNECTS DEVICES WITHIN A LIMITED AREA, SUCH AS A BUILDING
LOCK	A MECHANICAL OR ELECTRONIC DEVICE USED TO SECURE DOORS, CABINETS, OR CONTAINERS
LOGGING RECORDER	A DEVICE THAT RECORDS DATA OVER TIME, OFTEN USED IN MONITORING SYSTEMS
LOOP VEHICLE DETECT EQUIPMENT	EQUIPMENT USED TO DETECT VEHICLES AT INTERSECTIONS USING INDUCTIVE LOOPS
LOUVER	AN OPENING IN A BUILDING, DOOR, ETC., PROVIDED WITH ONE OR MORE SLANTED SLATS TO ALLOW AIR OR LIGHT TO ENTER WHILE KEEPING OUT RAIN OR DIRECT SUNLIGHT
LOW POINT DRAIN	A DRAIN LOCATED AT THE LOWEST POINT OF A SYSTEM TO ALLOW FOR COMPLETE DRAINAGE OF FLUIDS
MACHINE ROOM	A ROOM THAT HOUSES MACHINERY AND EQUIPMENT, TYPICALLY FOR ELEVATORS, HVAC SYSTEMS, OR INDUSTRIAL PROCESSES
MANHOLE	AN OPENING TO A CONFINED SPACE SUCH AS A SHAFT, SEWER, OR LARGE VESSEL, USED FOR INSPECTION AND MAINTENANCE
MAST ARM	A HORIZONTAL POLE USED TO MOUNT TRAFFIC SIGNALS OR LIGHTS ABOVE THE ROADWAY
MASTER CONTROLLER	A DEVICE THAT CENTRALLY CONTROLS MULTIPLE SYSTEMS OR DEVICES
MATRIX CODE GENERATOR	A DEVICE OR SOFTWARE THAT GENERATES MATRIX CODES, WHICH ARE 2D BARCODES USED FOR DATA REPRESENTATION
MATRIX SWITCH	A DEVICE THAT SWITCHES MULTIPLE INPUTS TO MULTIPLE OUTPUTS IN A MATRIX CONFIGURATION
MECHANICAL	PERTAINING TO MACHINERY OR TOOLS AND THEIR OPERATION
METER	A DEVICE THAT MEASURES AND RECORDS THE QUANTITY OF A SUBSTANCE, SUCH AS ELECTRICITY, WATER, OR GAS
MICROPHONE	A DEVICE THAT CONVERTS SOUND INTO AN ELECTRICAL SIGNAL FOR RECORDING OR AMPLIFICATION
MICROPROCESSOR	AN INTEGRATED CIRCUIT THAT CONTAINS THE FUNCTIONS OF A CENTRAL PROCESSING UNIT (CPU) OF A COMPUTER
MICROSCOPE	AN OPTICAL INSTRUMENT USED FOR VIEWING VERY SMALL OBJECTS, SUCH AS MINERAL SAMPLES OR BIOLOGICAL CELLS, TYPICALLY MAGNIFIED SEVERAL HUNDRED TIMES.
MICROWAVE	AN ELECTROMAGNETIC WAVE WITH A WAVELENGTH IN THE RANGE OF 0.001–0.3 METERS, USED IN RADAR, IN COMMUNICATIONS, AND FOR HEATING IN MICROWAVE OVENS.
MICROWAVE DETECTION EQUIPMENT	DEVICES USED TO DETECT AND MEASURE MICROWAVE SIGNALS, OFTEN USED IN SECURITY AND COMMUNICATION SYSTEMS
MILLWORK	WOODWORK, SUCH AS DOORS, WINDOWS, AND CABINETS, MANUFACTURED AT A MILL
MODEM	A DEVICE THAT CONVERTS DIGITAL DATA TO ANALOG SIGNALS AND VICE VERSA FOR TRANSMISSION OVER TELEPHONE LINES
MODIFIED PA SIREN	A MODIFIED PUBLIC ADDRESS AND INTERCOM SYSTEM SIREN USED FOR ALERTING AND COMMUNICATION PURPOSES
MODULE	A SELF-CONTAINED UNIT OR COMPONENT THAT CAN BE COMBINED WITH OTHERS TO CONSTRUCT A MORE COMPLEX SYSTEM
MONITOR SYSTEM	A SYSTEM USED FOR OBSERVING, CHECKING, OR KEEPING A CONTINUOUS RECORD OF A PROCESS OR QUANTITY
MONITORING MODULE	A DEVICE OR SOFTWARE COMPONENT USED TO OBSERVE AND REPORT THE STATUS OF A SYSTEM OR PROCESS
MOTOR	A MACHINE, ESPECIALLY ONE POWERED BY ELECTRICITY OR INTERNAL COMBUSTION, THAT SUPPLIES MOTIVE POWER FOR A VEHICLE OR FOR ANOTHER DEVICE WITH MOVING PARTS
MOTOR CONTROL CENTER (MCC)	AN ASSEMBLY TO CONTROL SOME OR ALL ELECTRIC MOTORS IN A CENTRAL LOCATION
MOTOR GENERATOR	A DEVICE FOR CONVERTING ELECTRICAL POWER FROM ONE FORM TO ANOTHER, SUCH AS AC TO DC OR VICE VERSA
MOTOR STARTER	A DEVICE THAT CONNECTS AND DISCONNECTS MOTORS FROM THE POWER SUPPLY AND PROVIDES OVERLOAD PROTECTION
MOUNT	A STRUCTURE OR DEVICE TO WHICH ANOTHER DEVICE IS ATTACHED FOR SUPPORT
MOVING WALKWAY EXTERNAL	A MOVING WALKWAY LOCATED OUTSIDE A BUILDING, TYPICALLY USED IN AIRPORTS OR LARGE COMPLEXES
MOVING WALKWAY INTERNAL	A MOVING WALKWAY LOCATED INSIDE A BUILDING, TYPICALLY USED IN AIRPORTS OR LARGE COMPLEXES
MULTIPLEXER	A DEVICE THAT COMBINES MULTIPLE SIGNALS INTO ONE SIGNAL FOR TRANSMISSION OVER A SINGLE MEDIUM
MV FEEDER CABLE	MEDIUM VOLTAGE CABLES USED TO DISTRIBUTE POWER FROM SUBSTATIONS TO TRANSFORMERS
NETWORK DEVICE	ANY DEVICE THAT CONNECTS TO A NETWORK, SUCH AS ROUTERS, SWITCHES, AND HUBS
NETWORK PROTECTOR	A DEVICE USED TO PROTECT ELECTRICAL NETWORKS FROM FAULTS AND OVERLOADING
NOZZLE	A DEVICE DESIGNED TO CONTROL THE DIRECTION OR CHARACTERISTICS OF FLUID FLOW AS IT EXITS AN ENCLOSED CHAMBER OR PIPE
OIL COOLER	A DEVICE USED TO COOL OIL, TYPICALLY IN ENGINES OR HYDRAULIC SYSTEMS
OIL WATER SEPARATOR	A DEVICE USED TO SEPARATE OIL AND WATER MIXTURES INTO THEIR SEPARATE COMPONENTS
OSCILLOSCOPE	AN ELECTRONIC TEST INSTRUMENT THAT ALLOWS OBSERVATION OF VARYING SIGNAL VOLTAGES, USUALLY AS A TWO-DIMENSIONAL PLOT
OTDR	A DEVICE USED TO TEST THE INTEGRITY OF FIBER OPTIC CABLES BY SENDING PULSES OF LIGHT AND MEASURING REFLECTIONS
OUTFALL	THE PLACE WHERE A SEWER, DRAIN, OR STREAM DISCHARGES; THE OUTLET OF A RIVER, STREAM, ETC
PACKAGED TERMINAL AC	A TYPE OF SELF-CONTAINED HEATING AND AIR CONDITIONING SYSTEM COMMONLY FOUND IN HOTELS AND MOTELS
PANEL	A FLAT OR CURVED COMPONENT, TYPICALLY RECTANGULAR, THAT FORMS OR IS SET INTO THE SURFACE OF A DOOR, WALL, OR CEILING
PARAPET	A LOW PROTECTIVE WALL ALONG THE EDGE OF A ROOF, BRIDGE, OR BALCONY
PASSAGEWAY	A LONG, NARROW WAY, TYPICALLY HAVING WALLS EITHER SIDE, THAT ALLOWS ACCESS BETWEEN BUILDINGS OR ROOMS
PASSENGER BOARDING BRIDGE	A MOVABLE BRIDGE PLACED AGAINST AN AIRCRAFT DOOR TO ALLOW PASSENGERS TO BOARD AND DISEMBARK
PAVEMENT	A HARD SURFACE FOR A ROAD, DRIVEWAY, OR SIDEWALK
PAVER	A PIECE OF EQUIPMENT USED TO LAY ASPHALT OR CONCRETE ON ROADS, DRIVEWAYS, OR OTHER SURFACES.
PEDESTRIAN DETECTOR	A DEVICE USED TO DETECT THE PRESENCE OF PEDESTRIANS
PEDESTRIAN SIGNAL HEAD LENS	THE LENS OF A PEDESTRIAN SIGNAL LIGHT
PERIMETER INTRUSION DETECTION	SYSTEMS DESIGNED TO DETECT UNAUTHORIZED ENTRY INTO A SECURED AREA
PHOTO EYE	AN ELECTRONIC DEVICE THAT DETECTS THE PRESENCE OF AN OBJECT BY USING A LIGHT BEAM
PHOTOCELL	A LIGHT-SENSITIVE CELL THAT GENERATES AN ELECTRIC SIGNAL IN RESPONSE TO LIGHT EXPOSURE
PILE	A LONG, SLENDER COLUMN TYPICALLY MADE OF STEEL OR CONCRETE, DRIVEN INTO THE GROUND TO SUPPORT A STRUCTURE
PILE CAP	A THICK CONCRETE MAT THAT RESTS ON PILES TO PROVIDE A STABLE FOUNDATION
PIPE	A TUBULAR SECTION OR HOLLOW CYLINDER USED TO CONVEY SUBSTANCES SUCH AS LIQUIDS, GASES, OR SOLIDS
PIT	A LARGE HOLE IN THE GROUND, TYPICALLY USED FOR STORAGE OR AS PART OF AN INDUSTRIAL PROCESS.
PLUMBING FIXTURE	DEVICES CONNECTED TO A PLUMBING SYSTEM FOR THE DELIVERY AND DRAINAGE OF WATER
POTABLE WATER CABINET	A CABINET THAT HOUSES A POTABLE WATER SUPPLY SYSTEM
POWER MONITOR	A DEVICE USED TO MONITOR THE POWER CONSUMPTION OF ELECTRICAL DEVICES
POWER SUPPLY	A DEVICE THAT SUPPLIES ELECTRICAL POWER TO AN ELECTRICAL LOAD
PRECONDITIONED AIR UNIT	A SYSTEM THAT SUPPLIES CONDITIONED AIR TO PARKED AIRCRAFT
PRINTER	A DEVICE THAT PRINTS TEXT OR IMAGES ONTO PAPER, ESPECIALLY ONE LINKED TO A COMPUTER
PROCESSOR	A CENTRAL PROCESSING UNIT (CPU) OR OTHER CHIP THAT PERFORMS THE PRIMARY COMPUTATIONS IN A COMPUTER
PROJECTOR	AN OPTICAL DEVICE THAT PROJECTS AN IMAGE (OR MOVING IMAGES) ONTO A SURFACE, COMMONLY A PROJECTION SCREEN
PULL STATION	A MANUAL DEVICE USED TO INITIATE A FIRE ALARM
PUMP	A DEVICE USED TO MOVE FLUIDS (LIQUIDS OR GASES), OR SOMETIMES SLURRIES, BY MECHANICAL ACTION
PUMP COUPLING	A DEVICE THAT CONNECTS THE PUMP SHAFT TO THE MOTOR SHAFT TO TRANSFER POWER
PURGE PANEL	A PANEL USED TO CONTROL THE PURGING OF AIR OR GAS FROM A SYSTEM
PUSH BUTTON	A SIMPLE SWITCH MECHANISM FOR CONTROLLING SOME ASPECT OF A MACHINE OR A PROCESS
RACK MODULAR UNIT	A MODULAR UNIT DESIGNED TO FIT INTO A RACK SYSTEM
RADIO	A DEVICE FOR RECEIVING, AND SOMETIMES FOR TRANSMITTING, SOUND MESSAGES, OR THE MESSAGES THEMSELVES BY RADIO WAVES
RADIO ANTENNA UNIT	A UNIT THAT TRANSMITS AND RECEIVES RADIO SIGNALS
RADIO FILTER	A DEVICE USED TO FILTER SPECIFIC FREQUENCIES FROM A RADIO SIGNAL
RADIO SCANNER	A DEVICE THAT AUTOMATICALLY SCANS AND RECEIVES RADIO FREQUENCIES
RAILING	A BARRIER OR GUARD, TYPICALLY MADE OF POSTS OR BARS, USED TO PREVENT FALLS OR PROVIDE SUPPORT
RAILROAD CABINET	A CABINET USED TO HOUSE CONTROL AND SIGNALING EQUIPMENT FOR RAILROADS
RAILROAD DETECTOR	A DEVICE USED TO DETECT THE PRESENCE OR POSITION OF A TRAIN ON THE TRACKS
RAILROAD FLASHER	A SIGNALING DEVICE USED AT RAILROAD CROSSINGS TO WARN OF APPROACHING TRAINS
RAILROAD SIGNAL	A SIGNAL USED TO CONTROL TRAIN MOVEMENTS AND PROVIDE INFORMATION TO TRAIN OPERATORS
RAMP	A SLOPED SURFACE JOINING TWO DIFFERENT LEVELS, USED BY VEHICLES OR PEDESTRIANS
RAMP METER TRAFFIC SIGNAL POLE	A POLE THAT SUPPORTS THE TRAFFIC SIGNALS USED IN RAMP METERING
RAMP METERING BASE	THE BASE INFRASTRUCTURE FOR RAMP METERING, WHICH CONTROLS THE RATE OF VEHICLES ENTERING A FREEWAY
RAMP METERING FOUNDATION	THE FOUNDATION THAT SUPPORTS THE RAMP METERING SYSTEM
REBROADCASTER	A DEVICE THAT RECEIVES AND RETRANSMITS SIGNALS TO EXTEND THE COVERAGE AREA
RECEIVER	A DEVICE THAT RECEIVES SIGNALS, SUCH AS RADIO OR TELEVISION BROADCASTS
RECEIVER MONITOR	A DEVICE USED TO MONITOR THE QUALITY AND STATUS OF RECEIVED SIGNALS
RECEIVER MULTICOUPLER	A DEVICE THAT ALLOWS MULTIPLE RECEIVERS TO USE A SINGLE ANTENNA
RECORD	TO CAPTURE AND STORE DATA OR INFORMATION FOR LATER USE
RECORDER	A DEVICE USED TO RECORD AUDIO, VIDEO, OR OTHER DATA
RECORDER SERVER	A SERVER USED TO STORE AND MANAGE RECORDED DATA
RECTIFIER	AN ELECTRICAL DEVICE THAT CONVERTS ALTERNATING CURRENT (AC) TO DIRECT CURRENT (DC)
REFLECTORIZED LINEAR MARKER	A MARKER WITH REFLECTIVE MATERIAL USED TO DELINEATE LANES OR GUIDE TRAFFIC
REFLECTORIZED POINT MARKER	A SMALL REFLECTIVE MARKER USED TO MARK SPECIFIC POINTS OR LOCATIONS
REGENERATED POWER ABSORPTION	A SYSTEM THAT ABSORBS AND DISSIPATES REGENERATED POWER IN ELECTRICAL SYSTEMS
REGULATOR	A DEVICE THAT CONTROLS THE PRESSURE, TEMPERATURE, OR FLOW OF A FLUID OR GAS
RELAY	AN ELECTRICAL DEVICE THAT OPENS OR CLOSES A CIRCUIT UNDER THE CONTROL OF ANOTHER ELECTRICAL CIRCUIT
RELAY MATRIX	AN ARRAY OF RELAYS USED TO CONTROL MULTIPLE CIRCUITS
RELAY MODULE	A MODULE CONTAINING ONE OR MORE RELAYS USED TO CONTROL MULTIPLE ELECTRICAL CIRCUITS
RELEASE STATION	A DEVICE USED TO MANUALLY RELEASE A SYSTEM, SUCH AS A FIRE SUPPRESSION SYSTEM
REPEATER	A DEVICE THAT RECEIVES AND RETRANSMITS A SIGNAL TO EXTEND ITS RANGE
REQUEST TO EXIT	A DEVICE USED IN ACCESS CONTROL SYSTEMS TO REQUEST THE DOOR TO BE UNLOCKED FOR EXIT
RETAINING WALL	A STRUCTURE DESIGNED TO HOLD BACK SOIL OR ROCK FROM A BUILDING, STRUCTURE, OR AREA
RETARD CHAMBER	A CHAMBER THAT DELAYS THE ACTIVATION OF A FIRE SPRINKLER SYSTEM TO PREVENT FALSE ALARMS
RISER TRACK	A VERTICAL TRACK USED TO GUIDE AND SUPPORT CABLES OR PIPES IN A BUILDING
ROADWAY	THE PART OF A ROAD INTENDED FOR VEHICLES, INCLUDING LANES AND SHOULDERS
ROLLER GUIDE	A GUIDE THAT USES ROLLERS TO SUPPORT AND GUIDE A MOVING COMPONENT, SUCH AS IN AN ELEVATOR SHAFT
ROOF	THE STRUCTURE FORMING THE UPPER COVERING OF A BUILDING
ROOF DECKING	THE STRUCTURAL SURFACE OVER WHICH ROOFING MATERIALS ARE APPLIED
ROOF MEMBRANE	A CONTINUOUS SHEET OF MATERIAL USED TO PREVENT WATER PENETRATION IN A ROOF SYSTEM
ROOM	AN ENCLOSED SPACE WITHIN A BUILDING
ROOM VENTILATION	A SYSTEM OR METHOD FOR PROVIDING FRESH AIR TO A ROOM AND REMOVING STALE AIR
RWIS DEVICE	ROAD WEATHER INFORMATION SYSTEM DEVICE USED TO COLLECT AND TRANSMIT WEATHER AND ROAD CONDITION DATA
RWIS ROAD SENSOR	A SENSOR USED IN A ROAD WEATHER INFORMATION SYSTEM TO MONITOR ROAD CONDITIONS
SAFETY DEVICE	EQUIPMENT DESIGNED TO PREVENT ACCIDENTS OR INJURIES, SUCH AS SAFETY GUARDS, INTERLOCKS, AND EMERGENCY STOPS
SAFETY KIT	A SET OF TOOLS AND SUPPLIES DESIGNED TO PROVIDE SAFETY AND AID IN EMERGENCY SITUATIONS
SCUPPER	AN OPENING IN THE SIDE OF A BUILDING OR SHIP FOR DRAINING WATER
SECURITY BOOTH	A SMALL ENCLOSED SPACE USED BY SECURITY PERSONNEL TO MONITOR AND CONTROL ACCESS TO A FACILITY
SELECTOR SWITCH	A SWITCH THAT ALLOWS THE USER TO SELECT ONE OF SEVERAL OPTIONS OR SETTINGS
SENSOR	A DEVICE THAT DETECTS AND RESPONDS TO A PHYSICAL STIMULUS SUCH AS TEMPERATURE, LIGHT, OR PRESSURE
SERVER	A COMPUTER THAT PROVIDES DATA OR SERVICES TO OTHER COMPUTERS OVER A NETWORK
SERVER RACK	A RACK USED TO MOUNT MULTIPLE PIECES OF NETWORK OR SERVER HARDWARE
SHAFT ENCODER	A DEVICE THAT CONVERTS THE ANGULAR POSITION OR MOTION OF A SHAFT TO AN ANALOG OR DIGITAL SIGNAL
SHELTER	A STRUCTURE THAT PROVIDES PROTECTION FROM THE ELEMENTS OR OTHER THREATS
SHUNT TIMER	A DEVICE THAT PROVIDES TIMED CONTROL OF ELECTRICAL SHUNT CIRCUITS
SIDEWALK	A PAVED PATH FOR PEDESTRIANS AT THE SIDE OF A ROAD
SIGN	A BOARD OR PLACARD DISPLAYED IN A PUBLIC PLACE TO CONVEY INFORMATION OR INSTRUCTIONS
SIGN PANEL	A FLAT, TYPICALLY RECTANGULAR COMPONENT OF A SIGN THAT DISPLAYS INFORMATION
SIGNAGE SUSPENSION	THE SYSTEM USED TO HANG OR SUPPORT SIGNS
SIGNAL HEAD	THE PART OF A TRAFFIC SIGNAL THAT HOUSES THE LIGHTS
SIGNAL PROCESSOR	A DEVICE THAT PROCESSES SIGNALS FOR THE PURPOSE OF IMPROVING OR INTERPRETING THE DATA
SLAB	A LARGE, THICK, FLAT PIECE OF STONE, CONCRETE, OR WOOD, TYPICALLY USED FOR CONSTRUCTION
SLOPE PROTECTION	MEASURES TAKEN TO PREVENT EROSION OR COLLAPSE OF SLOPES
SLUICE GATE	A GATE THAT CONTROLS THE FLOW OF WATER IN A CHANNEL OR SLUICE
SMOKE MANAGEMENT SYSTEM	A SYSTEM DESIGNED TO CONTROL THE MOVEMENT OF SMOKE IN A BUILDING DURING A FIRE
SOFTWARE	PROGRAMS AND OTHER OPERATING INFORMATION USED BY A COMPUTER
SOLDERING STATION	A WORKSTATION EQUIPPED FOR SOLDERING ELECTRONIC COMPONENTS
SPACE HEATER	A DEVICE USED TO HEAT A SINGLE, SMALL AREA
SPAN WIRE	A WIRE USED TO SUPPORT TRAFFIC SIGNALS OR OTHER SUSPENDED OBJECTS
SPAN WIRE TRAFFIC SIGNAL POLE	A POLE THAT SUPPORTS SPAN WIRES FOR TRAFFIC SIGNALS
SPEAKER	A DEVICE THAT CONVERTS ELECTRICAL SIGNALS INTO SOUND
SPECTRUM ANALYZER	AN INSTRUMENT USED TO EXAMINE THE SPECTRAL COMPOSITION OF ELECTRICAL, ACOUSTIC, OR OPTICAL WAVEFORM
SPLITTER	A DEVICE THAT DIVIDES A SIGNAL INTO MULTIPLE PATHS
SPRINKLER HEAD	THE PART OF A SPRINKLER SYSTEM THAT DISCHARGES WATER
STAIR	A SET OF STEPS LEADING FROM ONE FLOOR TO ANOTHER
STAIRWAY	A PASSAGE OR ROUTE FORMED BY A SET OF STAIRS
STANDPIPE	A VERTICAL PIPE THAT PROVIDES WATER TO FIRE HOSES IN BUILDINGS
STEAM TRAP	A DEVICE THAT REMOVES CONDENSATE FROM A STEAM SYSTEM WITHOUT LETTING STEAM ESCAPE
STICK RELEASE TIMER	A TIMING DEVICE USED IN VARIOUS INDUSTRIAL APPLICATIONS
STORAGE	SPACE OR A PLACE FOR STORING GOODS
STORECASTER	A TERM THAT MIGHT REQUIRE FURTHER CONTEXT OR IS NOT COMMONLY USED. [NEEDS CLARIFICATION]
STOREFRONT	THE FACADE OR ENTRYWAY OF A RETAIL STORE
STRAINER	A DEVICE USED TO FILTER OUT SOLID DEBRIS FROM A FLUID
STRINGER	A LONG HORIZONTAL MEMBER USED IN CONSTRUCTION, SUCH AS THE PART OF A STAIR THAT SUPPORTS THE TREADS
STRUCTURAL SUPPORT	ELEMENTS USED TO PROVIDE SUPPORT TO STRUCTURES, ENSURING STABILITY AND STRENGTH
SUPPORT	ANY STRUCTURAL ELEMENT THAT BEARS THE WEIGHT OF ANOTHER ELEMENT
SUPPRESSION SYSTEM	A SYSTEM DESIGNED TO EXTINGUISH OR CONTROL FIRES, SUCH AS SPRINKLERS OR GAS SUPPRESSION SYSTEMS
SURGE SUPPRESSOR	A DEVICE THAT PROTECTS ELECTRICAL EQUIPMENT FROM VOLTAGE SPIKES
SWALE	A LOW OR HOLLOW PLACE, ESPECIALLY A MARSHY DEPRESSION BETWEEN RIDGES
SWITCH	A DEVICE FOR MAKING AND BREAKING THE CONNECTION IN AN ELECTRICAL CIRCUIT
SWITCH HEATER	A DEVICE USED TO KEEP RAILROAD SWITCHES FREE FROM ICE AND SNOW
SWITCHGEAR	THE COMBINATION OF ELECTRICAL DISCONNECT SWITCHES, FUSES OR CIRCUIT BREAKERS USED TO CONTROL, PROTECT, AND ISOLATE ELECTRICAL EQUIPMENT
SYMBOL	A MARK OR CHARACTER USED AS A CONVENTIONAL REPRESENTATION OF AN OBJECT, FUNCTION, OR PROCESS
TANK	A LARGE CONTAINER FOR STORING LIQUIDS OR GASES
TELEPHONE	A DEVICE THAT CONVERTS SOUND, TYPICALLY THE HUMAN VOICE, INTO ELECTRONIC SIGNALS FOR COMMUNICATION
TELEPHONE INTERFACE	A DEVICE THAT ALLOWS TELEPHONE COMMUNICATION OVER OTHER MEDIA, SUCH AS A COMPUTER NETWORK
TEST IMPAIRMENT	A DEVICE OR PROCEDURE USED TO SIMULATE OR DETECT FAULTS IN SYSTEMS FOR TESTING PURPOSES
TEST METER	AN INSTRUMENT USED TO MEASURE ELECTRICAL QUANTITIES SUCH AS VOLTAGE, CURRENT, AND RESISTANCE
THRU-THE-WALL UNIT	AN AIR HANDLING UNIT DESIGNED TO BE INSTALLED THROUGH AN EXTERIOR WALL
TIDE RISER	A VERTICAL POST USED TO SUPPORT A DOCK, WHICH ADJUSTS WITH THE TIDE
TIMECLOCK	A CLOCK THAT RECORDS THE TIMES OF ARRIVAL AND DEPARTURE OF WORKERS
TONE REMOTE ADAPTER	A DEVICE USED IN COMMUNICATION SYSTEMS TO EXTEND THE RANGE OF RADIO SIGNALS
TRACK	A CONTINUOUS LINE OF RAILS ON WHICH TRAINS RUN
TRAFFIC SIGNAL CABINET	A CABINET THAT HOUSES THE CONTROL EQUIPMENT FOR TRAFFIC SIGNALS
TRAFFIC SIGNAL POLE	A POLE THAT SUPPORTS TRAFFIC SIGNALS
TRAFFIC SIGNAL SUPPORT	THE STRUCTURE THAT HOLDS UP TRAFFIC SIGNALS
TRAFFIC SWITCH	A SWITCH USED TO CONTROL TRAFFIC SIGNALS OR FLOW
TRANSCEIVER	A DEVICE THAT CAN BOTH TRANSMIT AND RECEIVE COMMUNICATIONS
TRANSFORMER	A DEVICE THAT TRANSFERS ELECTRICAL ENERGY BETWEEN TWO OR MORE CIRCUITS THROUGH ELECTROMAGNETIC INDUCTION
TRANSMITTER	A DEVICE THAT SENDS OUT SIGNALS IN THE FORM OF ELECTROMAGNETIC WAVES
TRAP	A DEVICE FOR CATCHING ANIMALS OR A PLUMBING FIXTURE TO PREVENT SEWER GASES FROM ENTERING A BUILDING
TRASH CAN	A CONTAINER FOR DISCARDING WASTE
TREE	A PERENNIAL PLANT WITH AN ELONGATED STEM OR TRUNK, SUPPORTING BRANCHES AND LEAVES
TRIPLEXER	A DEVICE THAT COMBINES THREE SIGNALS INTO ONE OR SPLITS ONE SIGNAL INTO THREE
TRITURATOR	A DEVICE USED TO GRIND OR CRUSH SUBSTANCES INTO A FINE POWDER
UPS	UNINTERRUPTIBLE POWER SUPPLY, A DEVICE THAT PROVIDES EMERGENCY POWER TO A LOAD WHEN THE INPUT POWER SOURCE FAILS
UPS SYSTEM	A SYSTEM CONSISTING OF A UPS AND RELATED EQUIPMENT FOR POWER PROTECTION
UTILITY VAULT	AN UNDERGROUND STRUCTURE THAT HOUSES UTILITY EQUIPMENT SUCH AS TRANSFORMERS AND SWITCHES
VALVE	A DEVICE THAT REGULATES, DIRECTS, OR CONTROLS THE FLOW OF A FLUID BY OPENING, CLOSING, OR PARTIALLY OBSTRUCTING PASSAGEWAYS
VARIABLE SPEED LIMIT SIGN	AN ELECTRONIC SIGN THAT DISPLAYS SPEED LIMITS THAT CAN BE CHANGED BASED ON CONDITIONS
VEHICLE BARRIER	A PHYSICAL STRUCTURE DESIGNED TO PREVENT OR CONTROL THE MOVEMENT OF VEHICLES
VEHICLE DETECTOR	A DEVICE USED TO DETECT THE PRESENCE OR PASSAGE OF VEHICLES
VEHICULAR SIGNAL HEAD LENS	THE LENS COMPONENT OF A VEHICLE TRAFFIC SIGNAL
VENT	AN OPENING THAT ALLOWS AIR, GAS, OR LIQUID TO PASS OUT OF OR INTO A CONFINED SPACE
VENTILATION	THE PROVISION OF FRESH AIR TO A ROOM, BUILDING, OR OTHER SPACE
VERTICAL SORTATION DEVICE	A DEVICE USED TO SORT ITEMS VERTICALLY IN AUTOMATED SYSTEMS
VFD	VARIABLE FREQUENCY DRIVE, A DEVICE USED TO CONTROL THE SPEED AND TORQUE OF ELECTRIC MOTORS
VIDEO DETECTION EQUIPMENT	EQUIPMENT USED TO DETECT AND ANALYZE VIDEO SIGNALS, OFTEN USED IN SECURITY SYSTEMS
VIDEO DISTRIBUTION AMPLIFIER	A DEVICE THAT AMPLIFIES AND DISTRIBUTES VIDEO SIGNALS TO MULTIPLE OUTPUTS
VIDEO MANAGEMENT SYSTEM	A SYSTEM USED TO MANAGE AND CONTROL VIDEO SURVEILLANCE EQUIPMENT AND RECORDINGS
VOICE CONTROL MODULE	A DEVICE THAT ALLOWS CONTROL OF SYSTEMS OR DEVICES USING VOICE COMMANDS
WALL	A VERTICAL STRUCTURE THAT DIVIDES OR ENCLOSES SPACES
WASH STATION	A FACILITY OR EQUIPMENT FOR WASHING HANDS, TOOLS, OR EQUIPMENT
WATER CART	A CART USED TO TRANSPORT WATER FOR VARIOUS PURPOSES
WATER COOLER	A DEVICE THAT COOLS AND DISPENSES DRINKING WATER
WATER SUPPLY PIPING	PIPES USED TO DISTRIBUTE POTABLE WATER WITHIN A BUILDING OR SYSTEM
WEARING SURFACE	THE TOP LAYER OF A PAVEMENT, DESIGNED TO RESIST WEAR FROM TRAFFIC
WEATHER STATION	A FACILITY OR DEVICE THAT COLLECTS DATA RELATED TO THE WEATHER AND ENVIRONMENT USING VARIOUS SENSORS AND INSTRUMENTS
WINDOW	AN OPENING IN THE WALL OR ROOF OF A BUILDING, FITTED WITH GLASS, TO ADMIT LIGHT OR AIR AND ALLOW PEOPLE TO SEE OUT
WIRING	THE SYSTEM OF WIRES AND CABLES USED TO TRANSMIT ELECTRICITY OR DATA WITHIN A BUILDING OR STRUCTURE
WORKS OF ART	NEED MORE INFORMATION
WORKSTATION	AN AREA WHERE WORK OF A PARTICULAR NATURE IS CARRIED OUT, TYPICALLY EQUIPPED WITH NECESSARY TOOLS, EQUIPMENT, AND MATERIALS
XRAY MACHINE	A MACHINE THAT USES X-RAYS TO CREATE IMAGES OF THE INSIDE OF OBJECTS, COMMONLY USED IN MEDICAL IMAGING AND SECURITY SCREENING