Dictionary

A

Ampere

Alternating Current (AC)

ACAE: Air Conditioning Airflow Efficiency 

Access Control and Monitoring System (ACAMS)

Access Card

Access Control

Access Control Unit (ACU)

Access Level

Access Point

AHU: Air Handling Unit

Airside Economizer

Aisle

Alarm Input

Alarm Mask

Ambient Light

Ambient Noise

Amplifier

Analog

ANSI

Anti-Static

Arc Flash 

Architectural Hardware Consultant

ASHRAE

Aspect Ratio

ATS: Automatic Transfer Switch

Audio Processor

Audio Signal

Available Space

Attenuation

Auto-Iris Lens

 

B

BACnet

BAS (Building Automation System)

Backbone

Bandwidth

Barcode

Battery

Bend Radius

Bend-Insensitive Fiber (BIF)

BICSI

 

Biometrics

Biometric Access

Biometric Reader

Bit

Bit depth

Blade Server

Blanking Panel 

Block Diagram

 

Blocking

BNC

Bonding

Boundary Microphone

Branch Circuit 

BTU: British Thermal Unit

Building Automation System (BAS)

Buffer Capacity 

 

Building Management Software (BMS)

Building Information Modeling (BIM)

Building Intelligence (BI)

Building Energy Management Systems (BEMS)

Building Productivity

Burn In 

Bypass Airflow

C

Cabinet

CAC: Cold Aisle Containment

Cardioid

CCD Image Sensor

Calibrated Vectored Cooling (CVC)

Category 5 (Cat 5)

Category 5e (Cat 5e)

Category 6 (Cat 6)

Central Patching

Cleave

Closed Circuit Television (CCTV)

Certified Protection Professional (CPP)

Calibrated Vector Cooling (CVC)

CapEx

Cat 6 Cable

CCTV

Ceiling to Deck Height

CFD: Computational Fluid Dynamics

CFM: Cubic Feet per Minute

Chilled Water System 

Chiller

Chiller Feeds

Closed Coupled Cooling

Cloud Computing 

Cloud Storage API 

CODEC

Component Video

Composite Video Signal

Condenser Microphones

Coaxial Cable

Cold Aisle 

Cold Spot 

Colocation 

Commissioning 

Communication Protocols

Computerized Maintenance Management System (CMMS)

Concurrently Maintainable 

Condensate Piping 

Condenser 

Containment 

Converged Infrastructure

Cooling Tower

Cone

Conferencing Systems

Conduit

Construction Document Technology (CDTC)

Core

CRAC

CRAC

CRAH

Critical Load

Cricital Cooling Load 

Cutout 

CW: Chilled Water

CWR

CWS

 

D

Data Center

Data Center Shell

dBSPL

DC: Direct Current 

Decibel

Dedicated Hosting

Delay

Depth-of-Field

Dehumidification

Dehumidifying | Humidifying (D/H)

Delta T

Device Address

Digital

Digital Signage Processing (DSP)

Digital-to-Analog Converter

Digital Twin City 

Digital Video Recorder (DVR)

Distributed Sound

Direct Current (DC)

Direct Space

Disarm 

Discharge Rate

Distribution Cell

Distribution Frame

Distribution Panel

DLP

Document Camera

Door Control Relay

Door Forced

Door Held 

Door Held Time / Door Open Time

Door Switch Monitor (DSM)/ Door Contact

Double Interlock Pre-Action Fire Sprinkler

Down Flow

Downtime 

Dual Technology 

Duress Alarm 

DVI 

DVI-D

DX

 

F

Facility Code

Fail Safe 

Fail Secure 

Fault Current 

Feeder Conductor

Feedback

Ferrule 

Fiber Optic

Field of View

Fire Rated

Fire Stop 

Firewall

 

Floor Drains 

Floor Puller 

Floor Tile 

Fluid Cooler

Focal Length 

Footcandle 

Footprint

Free Cooling

Frequency

FTP

Full Service Rental Rate

Furcation Tubing 

G

Gain 

Generator Electrical Feeds

Global Linking

Glycol

Glycol Cooled System

 

GPH: Gallons per hour

Green Data Center

Ground 

Ground Fault

H

Hall-POD

Halon

Harmonic Distortion

HDG

HDTV

Heat Exchanger

HEPA (High Efficiency Particle Accumulation)

Hertz

History 

Host Panel 

Hosting 

Horizontal Distribution Area (HDA)

Hot Air

Hot Aisle/ Cold Aisle

Hot Aisle Containment (HAC)

Hot Gas Line

Hot Spot

Humidification

Humidifier

HVAC

Hybrid Cloud

I

IEEE (Institute of Electrical and Electronics)

Image Compression

Impedance

Infrared

Infrared Scanning

Infrastructure as Service (Iaas)

 

Inlet Air

Inrush Current

Insertion Loss 

Intelligent Power Management

Intelligent Building 

Intelligent Office

Intermediate Distribution Area (IDA)

Indoor GIS Mapping 

Interlock 

Internet Service Provider

In-Row Cooling

Inergen

IoT – Internet of Things

IP (Internet Protocol)

IP Address

IP Camera

ISDN 

Isolation Relay 

K

Keypad

Kevlar 

Kilowatt (kW)

Kilowatt-Hour (kWh)

Kilovol Amperes (kVA)

KVM

 

L

LAN (Local Area Network)

Latent Cooling

Latent Cooling Capacity

Lavalier

LCD

LCoS

Lead Acid Battery 

Leak Detection

Leasing Activity 

Leasing Space


LED

Lightning Arrester

Lights Out Server Room

Line Noise

Liquid Cooling

Liquid Line

Load

Load Balancing

Load Bank

Local Audible Alarm (LAL)

Local Moniter 

Locking Hardware

Loose Tube Buffering 

Loss Budget 

Low Voltage System 

Local Monitor

Loudspeaker

Low Smoke Zero Halogen (LSZh)

Lumen

LUX

M

Mag Lock

Magnetic Reader

Magnetic Stripe

MAH: Makeup Air Handler

Make-Up Air

Managed Hosting 

Managed Services

Manual Transfer Switch (MTS)

Man Trap 

Mass Marketing Hosting

Matrix Switcher

Maximum Temperature Rate of Change

MBP/MBC

MBC: Main Circuit Breaker

MDA (Main Distribution Area

 

Megapixel IP Camera 

Mean Time Between Failures (MTBF)

Mean Time to Repair (MTTR)

Mixer

Modbus

Mode 

Modular

Modulator

Motion Detection 

Multi-Mode Fiber

MPEG 

MPEG-2

MPEG-4

Multi-Tenant

Multiplexing

Multipoint

MW

N

N+1 Redudancy

Near End Crosstalk (NEXT)

NEBS

NEC

Net Absorption

Net Rental Rate

Network Cabinets

Network Camera 

Network Cross Connections

Network Video Recorder

New Space

NFPA

Nominal Cooling Capacity

NTSC

O

Occupied Space

OCP 

OM3

OM4

Omni-Directional

OpEx

Optical Turnstile 

Output Relays 

Overcooling 

P

Packet Acceleration

PAL

Pan 

Parallel Generator System

Parasitic Load

Passive Infrared (PIR)

Personal Identification (PIN)

PDP

PDU: Power Distribution Unit

Pedestal

PH

Phantom Power

Phase

Pink Noise

Pixel 

Plasma Display Panel (PDP)

Platform as a Service

Plenum 

Point-to-Point

Point-Source

Pole

Pole Position

Portal 

Potential Transformer

Power 

Power Density

Power Factor 

Power Over Ethernet 

Prefabrication 

Preleased Space

Premium Colocation 

Pre-Action 

Pre-Action Fire Sprinkler 

Precision Air Conditioning 

Pressure DIfferential 

Primary Loop

Private Cloud 

Programmable Logic Controller

Proximity

Proximity Reader

PTZ

PUE 

Public Cloud

Pump Package

Pumps 

Punch Down 

R

Rack

Rack Unit (RU)

Radio Frequency (RF)

Radio Frequency Interference (RFI)

RAH: Recirculation Air Handler 

Raised Floor

Rear Screen Projection

Reader

Recirculation

Redundancy 

Relative Humidity 

Reliability 

Remote Host

Remote Replication 

Request to Exit (REX)

Resolution 

REST

Return Air

Return Loss 

Reverberant Sound 

RF System 

RFI 

RH

RGBHV

RGBS

RGSB

Riser Cable 

Rope Detector 

Row Based Cooling 

RPP 

RTU

RU 

S

S+S

SAN: Storage Area Network

Scalability

Scaler

SCFM

Scan Conversion 

SDTV

Secondary Loop

Security Equipment Enclosure (SEC)

Security Operation Center (SOC)

Seebeck Effect

Sensible Cooling Capacity

Sensible Heat

Sensible Heat Ratio

Server

Server Cabinets

Server Room

Set Point

Shared Hosting

Sheath 

Shear Lock 

Short Cycling

Shotgun Microphone

Shunt Time 

Signal Generator

Signal to Noise Ratio

Single-Mode Fiber 

Single Phase

Single Tenant

Smart Building 

Smart Building Software

Smart Building IoT

Smart Commercial Buildings 

Smart Office 

Smart City 

Smart Card 

Spare/Space

Spike

Spike/ Surge Protector

Splice

Splitter

Spot Detector

SSID 

Stand Alone 

Status Switch 

Standard Temperature and Pressure

Standby Generator 

Static Transfer Switch 

Step Down Transformers

Streaming Video and Audio

Strength Member 

Strike 

Stringer 

Structured Cablng 

Storeroom Function 

STS

Subwoofers

Sub Floor 

Supply Air 

Supervision 

Surge

Surface Mount Microphone 

Surround Sound

S-Video 

Switcher

Switchgear 

Sync

T

Tailgating 

Tampering Alarm 

Tenant Experience 

Tensile Strength 

Thermistor

Thermoelectric Cooling

THHN

Three Phase

Throw Distance

TIA-942

TIA/EIA-568-B

Tier I

Tier II

Tier III

Tier IV

Tight Buffer

Tilt 

Time Zone 

Tons 

Traditional Non Scalable UPS 

Transaction 

Transformer 

Transient Voltage Surge Surpressor

Turning Vane

Turnstile 

TVSS

Tweeters

U

U

UL 

Unified Computing System 

Uninterruptible Cooling

Up Flow

UPS 

UPS Powers

Usable KVA per Circuit 

Usable Kw per Circuit 

Usable VA per Circuit 

Utility Power

V

VA

Vale Regulated Sealed Cell

Vapor Barrier

Venting 

VFD 

Video Server 

Viewing Angle 

Viewing Cone

Virtualization

VMware Backup 

VoIP 

Volt 

Voltage

W

WAN 

Water-Cooled System 

Water Cooling 

Water Detector 

Waterside Economizer

Watt

Wiegand

Wet Bulb Temperature 

Wg

White Noise

Wholesale Data Center

Wholesale Turnkey

Wireless Network Camera 

WLAN 

Woofers

Work Cell

Workplace Productivity 

Workplace Experience Strategy 

Workplace Experience App

WPA 

WPSFL Watts per Square Foot

WUE: Water Usage Effectiveness

Z

ZDA (Zone Distribution Area)

Zoom Lens 

Zinc Whiskers

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