AVB

Automatic Vacuum Brake

BS

Braking in Series configuration

BSP

Braking in Series-Parallel configuration

DJ

From the French disjoncteur, the main circuit breaker of an electric loco 

DEMU

Diesel-Electric Multiple Unit

DETC

Diesel-Electric Tower Car

DHMU

Diesel Hydraulic Multiple Unit

DMH

Dead Man's Handle 

DMU

Diesel Multiple Unit

DPC

Driving Power Car

DS

Disconnecting Switch

DTC

Driving Trailer Car 

ELCM

Electronic Load Control Module 

EMU

Electric Multiple Unit

EOG

End-On Generator Car

ETCS

European Train Control System

FEDL

Fully Electrified Double Line

FOR

Forward motion

GTO

Gate Turn-Off thyristor

HEP

Head-end Power (power from the loco for the coaches)

HOG

Head-On Generator

HHPDMU

High-Horsepower Diesel Electric Multiple Unit

HPDMU

High-powered Diesel Multiple Unit

HSCB

High-speed Circuit Breaker

HT

High Tension

HTCBC

High Tensile-strength Centre-Buffer Coupler

HTS

High Tensile-strength Steel

IGBT

Insulated Gate Bipolar Transistor

JRI

Junction Route Indicator

LOB

Lube Oil Balance

LVC

Last Vehicle Check 

MCB

Master Circuit Breaker (in locos)

MCI

Malleable Cast Iron

MEMU

Main-line Electric Multiple Unit

MLRI

Multi-Lamp Route Indicator

MOG

Mid-On Generator Car

MOT

Motoring (master controller in loco)

OHE

Overhead Equipment

PCS

Pneumatic Control System

REV

Reverse motion , Reverser

SCADA

Supervisory Control and Data Acquisition

SOD

Schedule of Dimensions

STR

Schedule of Technical Requirements

TAB

Train Air Brake

TLC

Traction Locomotive Controller

TM

Traction Motor

TPC

Traction Power Controller

TRO

Traction Rolling-stock Operations

TSS

Traction Sub-Station

UPF

Unity Power Factor

VCC

Vacuum Continuity Certificate (issued before train departure)

VCB

Vacuum Circuit Breaker

VRP

Voltage Regulating Panel

WILD

Wheel Impact Load Detector

WSR

Wheel Slip Relay