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