a.c. Alternating Current

ADP Automatic Data Processing

AVI Automatic Vehicle Identification

ASD Accelerated Spectral Density

AQL Acceptable Quality Level

BS British Standard

BSI British Standards Institution

CAD Computer Aided Design

CECC CENELEC Electronic Components Committee

CEN Comité Européen de Normalisation

CENELEC Comité Européen de Normalisation Electrotechnique

CER Community of European Railways

CGPM Conférence Générale des Poids et Mesures

CPS Control and Protective Switching Device

d.c. Direct Current

DTI Department of Trade and Industry

EU European Community

EEC European Economic Commission

EMC ElectroMagnetic Compatibility

EMI ElectroMagnetic Interference

EN European Normalisation

ENV European pre-standards

ERRI European Rail Research Institute

HBES Home and Building Electronic Systems

HEMP High Altitude ElectroMagnetic Pulse

HV High Voltage

IEC International Electrotechnical Commission

ILU Integrated Logistic Unit

IPC Implant Point of Coupling

ILI Infonorme London Information

I/O Input/Output

ISM Industrial, Scientific and Medical

ISO International Standards Organisation

IT Information Technology

ITCZ International Conveyance Zone

ITE Information Technology Equipment

LUR Logical User Requirement

MDD Medical Devices Directive

MMI Man Machine Interface

MKS Metre-Kilogram-Second

MTBF Mean Time Between Failures

NSO National Standards Organisation

PCB Printed Circuit Board

prEN European draft standards

QA Quality Assurance

QC Quality Control

QMS Quality Management System

QP Quality Procedure

r.m.s. Root Mean Square

RAH Relative Air Humidity

RAM Reliability, Availability and Maintainability

RCBO Residual Current Operated Circuit Breaker without integral overcurrent protection

RCCB Residual Current Operated Circuit Breaker with integral overcurrent protection

RCD Residual Current Operated Protective Device

RF Radio Frequency

RH Relative Air Humidity (alternative abbreviation)

SI Systéme International d’Unités

S/N Signal Noise Ratio

T&E Time and Expense

TLV Threshold Limit Values

TVL-C Threshold Limit Values – Ceiling List

TQM Total Quality Management

UPS Uninterruptible Power System

VDU Visual Display Unit

WAUILF Workplace Applied Uniform Indicated Low Frequency (application)

WI Work Instruction

YFR Yearly Forecast Rationale