Acronyms and Abbreviations


Abbrv. Meaning
A Ampere
AAAHC Accreditation Association for Ambulatory Health Care
AC Alternating Current
ACD Automated Call Distribution
AED Automated External Defibrillator
ADA Americans with Disabilities Act
A/D Analog to Digital
ADSL Asynchronous Digital Subscriber Line
AE Application Engineer
Ah Ampere-hour
AHJ Authorities Having Jurisdiction
AIA American Institute of Architects
ALARA As Low As Reasonably Achievable
ALI Analog Line Interface
AM Amplitude Modulation
ANSI American National Standards Institute
ASCII American Standard Code for Information Interchange
ASHRAE American Society of Heating, Refrigerating and Air Conditioning Engineers
ASTM American Society for Testing and Materials


Abbrv. Meaning
B Magnetic Flux
BJT Bipolar Junction Transistor
BTU British Thermal Unit


Abbrv. Meaning
C/kg Coulomb per kilogram
CAD Computer-Aided Design
CBS Cell Broadcast Service
CAM Computer-Aided Manufacturing
CAP College of American Pathology
CATV Cable Television
CCD Charge-coupled device
CCTV Closed-Circuit Television
CDC Centers for Disease Control and Prevention
CEMS Clinical Equipment Management Systems
CFC Chlorofluorocarbon
CFR Code of Federal Regulations
CMMS Computerized Maintenance Management Software
CMOS Complementary Metal-Oxide Semiconductor
CMS Centers for Medicare & Medicaid Services
CR Computed radiography
CRT Cathode ray tube
CW Continuous Wave


Abbrv. Meaning
.DAT Data (file name extension)
D/A Digital to Analog
dB Decibel
dBm dB referenced to 1 milliWatt
DC Direct Current
DC Discharged
DEMUX Demultiplexer
DICOM Digital Imaging and Communications in Medicine
DOL US Department of Labor
DOT US Department of Transportation
DPDT Double-Pole Double-Throw (switch)
DR Digital Radiography
DSL Digital Subscriber Line
DX Distance Communication


Abbrv. Meaning
E2C Energy Efficiency Commitment
EC Environment Care (JCAHO)
ECC Error Correction Code
ECL Emitter-Coupled Logic
ECN Engineering Change Notice
ECN Equipment Control Number
ECO Engineering Change Order
ECR Engineering Change Request
EG Band Gap Energy
EHR Electronic Health Record
EIA Electronic Industries Association
EISA Enhanced Industry Standard Architecture
EM Emergency Management
EMF Electromagnetic Field
EMI Electromagnetic interference
EMS Emergency Management System
EMR Electronic Medical Record
EOC Environment of Care
EPA Environmental Protection Agency
EPACT Energy Policy Act of 1992
EP Elements of Performance (JCAHO)
EPS Emergency Power Supply
EPSS Emergency Power Supply System


Abbrv. Meaning
f frequency
FCC Federal Communications Commission
FDA Food and Drug Administration
FET Field Effect Transistor
FIFO First-In, First-Out
FILO First-In, Last-Out
FM Frequency Modulation
FMEA Failure Mode Effect Analysis
FO Fiber Optics
FTE Full-time equivalent


Abbrv. Meaning
GFCI Ground Fault Circuit Interrupter
GFPE Ground Fault Protection Equipment
GIS Geographical Information Systems
GND Input Ground Supply Line
GMS Global System for Mobile Communications
Gy Gray


Abbrv. Meaning
HazCom HAZardous COMmunications
HazMat HAZardous MATeriels
HEPA High Efficiency Particulate Air Filter
HFC Hydrochlorofluorocarbon
HID High Intensity Discharge
HIPPA Health Insurance Portability and Accountability Act of 1996
HIS Hospital Information System
HVAC Heating Ventilation and Air Conditioning


Abbrv. Meaning
IAP Indoor Air Pollution
IAQ Indoor Air Quality
ICRA Infection Control Risk Assessment
I/O Input/Output
ILSM Interim Life Safety Measure
ISO International Organization for Standardization
ISO Independent Service Organizations


Abbrv. Meaning
JCAHO JC Joint Commission
JIT Just-In-Time


Abbrv. Meaning
kT Noise Power Density
KW Kilowatt
KWh Kilo Watt Hour
KVA Kilovolt-ampere
kVp Kilovoltage Peak
kVcp Kilovoltage Constant Potential
kV Kilovoltage [same as kVp]


Abbrv. Meaning
LCC Life-Cycle Cost
LCD Liquid-Crystal Display
LED Light Emitting Diode
LEL Lower Explosive / Exposure Level
LIFO Last In, First Out
LILO Last In, Last Out
LISTSERV List Server [Internet]
LOC Life Safety Code
LPT1 First Parallel Printer Port
LS Life Safety (JCAHO)


Abbrv. Meaning
mA Milli Amepere
mmHG Millimeter of Mercury
MOSFET Metal Oxide Semiconductor Field Effect Transistor
MSDS Material Safety Data Sheets
MSHA Mine Safety and Health Administration
MUX Multiplexer
mV Millivolt


Abbrv. Meaning
NECNational Electric Code
NEP noise equivalent power
NFPA National Fire Protection Agency
NIOSH National Institute for Occupational Safety and Health
NIST National Institute of Standards and Technology
NiCad Nickel-cadmium / NiCad Battery
NPI National Provider Identifier
NPV Net Present Value
NRC Noise Reduction Coefficient
NTP National Toxicology Program


Abbrv. Meaning
OBD On Board Diagnostics
OD Outside Diameter
OEM Original Equipment Manufacturer
OSHA Occupational Safety and Health Administration
OVP Operational Verification Procedure


Abbrv. Meaning
PACS Picture Archiving and Communication System
PASS Pull, Aim, Squeeze, and Sweep
PBX Private Branch Exchange
PDA Personal Digital Assistant
PE Professional Engineer
PEL Permissible Exposure Limit
PFI Plan For Improvement
PHI Protected Health Information
PHR Personal health record
PI Performance Improvement
PIPO Parallel In, Parallel Out
PLC Programmable Logic Controller
PPE Personal Protective Equipment
PPM Parts Per Million
PSI Pounds Per Square Inch


Abbrv. Meaning
QoS Quality of Service
QA Quality Assurance


Abbrv. Meaning
RACE Rescue, Alarm, Contain, Extinguish/Evacuate
RF Radio frequency
rem Roentgen Equivalent Man
RFI Request For Information
RFID Radio-frequency identification
RFP Request For Proposal
RH Relative Humidity
RIS Radiology Information System
RMS Root Mean Square
ROI Return on Investment
RTTY Radio-teletype
RX Receive pin
RXD Receive pin
RZ Return to Zero pin


Abbrv. Meaning
SSB Single Sideband
STEL Short-Term Exposure Limit
SOC Statement Of Conditions or State of charge
SOW Scope of Work
Sv Sievert


Abbrv. Meaning
T Temperature
t Time
THD Total Harmonic Distortion
TJC The Joint Commission
TLV Threshold Limit Value
TQM Total Quality Management
TTL Transistor Transistor Logic
Tx Treatment
TWA Time-Weighted Average


Abbrv. Meaning
UEL Upper Explosive / Exposure Level
UDI Unique Device Identification
USB Universal Serial Bus
UPS Uninterruptible Power Supply


Abbrv. Meaning
V Volt
VAR VARISTOR or variable resistor
VAV Variable Air Volume
Vbb Input Voltage Battery Supply pin
VCC Input Voltage Supply pin
VOIP Voice Over Internet Protocol
V+ Input Voltage Positive Supply pin
V- Input Voltage Ground/Negative Supply pin
VSD Variable Speed Drive


Abbrv. Meaning
W Watt (Power)
Wh Watt-hour
WLAN Wireless Local Area Network
WMTS Wireless Medical Telemetry Service


Abbrv. Meaning
X Reactance
X-ray Radiology


Abbrv. Meaning
Y2K the Millennium bug or the Y2K bug or simply Y2K
Y As in a coordinate axis in a plane


Abbrv. Meaning
Z Zero
Z Impedance
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