INIS
airplanes
4%
animals
4%
ballasts
4%
bridges
9%
capital
4%
carbon dioxide
4%
cargo
4%
cities
19%
classification
4%
comparative evaluations
9%
competition
14%
computer codes
4%
computer networks
4%
computer-aided design
4%
computers
100%
consumer products
4%
control
4%
control systems
4%
conventions
4%
cost
4%
devices
47%
diesel engines
4%
electric power
4%
emission
4%
energy efficiency
4%
engines
9%
equipment
4%
europe
4%
foundations
4%
freight
9%
fuels
4%
germany
4%
global warming
4%
great britain
4%
greece
4%
horses
4%
increasing
9%
information
9%
input-output
4%
integrated circuits
4%
internet
4%
inventions
9%
japan
4%
land transport
4%
levels
9%
locomotives
42%
market
4%
men
4%
metals
4%
mice
4%
microcomputers
4%
microprocessors
9%
microwave ovens
4%
monitors
4%
monorails
4%
mos transistors
4%
mosfet
4%
operation
33%
output
4%
passengers
19%
people
4%
performance
14%
personal computers
4%
power
19%
prices
9%
processing
14%
rail transport
19%
railways
100%
range
9%
rapid transit systems
4%
remote control
4%
road transport
9%
roads
9%
robots
4%
rolling
14%
rubbers
4%
screens
4%
seasons
4%
semiconductor materials
9%
ships
4%
silicon
4%
slabs
4%
speed
9%
standardization
4%
steam
33%
steels
4%
stocks
14%
surfaces
4%
switzerland
4%
tracks
23%
trains
19%
transistors
9%
transport
33%
underground
9%
united kingdom
14%
units
9%
variations
4%
vehicles
19%
viruses
100%
water
4%
wheels
4%
Earth and Planetary Sciences
Carbon Dioxide Emission
25%
Central Processing Unit
25%
Computer Network
25%
Computer System
25%
Consumer Product
25%
Control System
25%
Diesel
50%
Diesel Engine
25%
Digital Electronics
25%
Energy Efficiency
25%
Europe
25%
Flat Surface
25%
Germany
25%
Global Warming
25%
Greece
25%
High-Speed Railway
25%
Industrial Product
25%
Integrated Circuit
25%
Japan
25%
London
25%
Mechanical Device
25%
Memory (Computers)
25%
Microcomputer
25%
Personal Computer
25%
Physical Activity
50%
Rail Transport
100%
Railway Network
25%
Railway Transport
25%
Rapid Transit Systems
25%
Remote Control
25%
Road Transport
50%
Switzerland
25%
Transferring
25%
Transport System
50%
Underground Railway
25%
United Kingdom
50%
United Kingdom
25%
Computer Science
Energy Efficiency
50%
Global Warming
50%
Greenwich Mean Time
50%
Railway System
100%
Road Transport
100%
Signalling System
50%
Economics, Econometrics and Finance
Energy Conservation
50%
Environmental Consciousness
50%
Invention Process
100%
Operating System
50%
Road Transportation
100%
Social Sciences
Administrative Structure
8%
Computer Aided Design
4%
Computer Network
4%
Computer Storage Devices
4%
Computer System
4%
Computers
4%
Consumers
4%
Electric Power
4%
First World
4%
Germany
4%
Global Warming
4%
Greece
4%
Guides
4%
Industrial Robot
4%
Industrialization
8%
Integrated Circuits
4%
Invention Process
8%
Japan
4%
Lawyer
4%
London
4%
Microcomputer
4%
Mobile Phones
4%
Nineteenth Century
4%
Personal Computer
4%
Physical Activity
8%
Popular Sport
4%
Rail Vehicle
4%
Railway
100%
Railway Transport
4%
Revolutions
8%
Road Transportation
8%
Transport Systems
8%
Twentieth Century
4%
UK
8%
World War II
8%
Engineering
Council of Europe
4%
Diesel Engine
4%
Diesel Locomotives
8%
Energy Conservation
4%
Energy Efficiency
4%
Flat Surface
4%
Frictional Resistance
4%
Germany
4%
Global Warming
4%
Greece
4%
Japan
4%
Local Time
4%
Physical Element
4%
Road Transportation
8%
Road Vehicle
4%
Rolling Stock
12%
Signalling System
4%
Slab Track
4%
Steam Engines
8%
Steam Locomotives
20%
Steel Rail
4%
Subsurface
4%
Technical Performance
4%