CAD Computer Aided Design
CFD Computational Fluid Dynamics
DCS Distributed Control System
FGS Fire, Gas and Smoke detector
HSE Health, Safety and Environment
IPF Instrumented Protective Function
IPS Instrumented Protective System
LED Light Emitting Diode
LOS Line of Sight
OEL Occupational Exposure Limit
PFD Probability of Failure on Demand
QRA Quantative Risk Assessment
SFR Safe Failure Robustness
SIL Safety Integrity Level
STEL Short Term Exposure Limit
TLV Threshold Limit Value
UPS Uninterruptible Power Supply