INIS
tornadoes
100%
schools
100%
trains
100%
humans
58%
control
37%
clouds
35%
environment
33%
freight
33%
passengers
33%
wind
28%
maintenance
25%
tracks
25%
locomotives
25%
speed
22%
education
21%
tools
20%
economy
20%
inventions
20%
travel
17%
fires
17%
cars
16%
engines
16%
wires
16%
transport
16%
cargo
16%
vehicles
16%
water
15%
steam
15%
cyclones
14%
air
14%
usa
14%
surfaces
14%
dusts
14%
learning
12%
barriers
10%
by-products
10%
hands
10%
resources
10%
investigations
10%
telephones
10%
production
10%
pollution
10%
ethics
10%
productivity
10%
values
10%
people
10%
efficiency
10%
internet
10%
wheels
10%
operation
10%
food
10%
presses
10%
children
9%
universities
9%
units
8%
france
8%
winches
8%
railways
8%
cables
8%
pneumatics
8%
motors
8%
rapid transit systems
8%
monorails
8%
gas turbines
8%
machinery
8%
propulsion
8%
repair
8%
equipment
8%
birth
8%
electric batteries
8%
gravitation
8%
trucks
8%
horses
8%
power
8%
rail transport
8%
data
7%
meteorology
7%
alps
7%
low-pressure areas
7%
storms
7%
south america
7%
south africa
7%
north america
7%
northern hemisphere
7%
spain
7%
new zealand
7%
japan
7%
reflectivity
7%
velocity
7%
australia
7%
pulses
7%
size
7%
risks
7%
europe
7%
uruguay
7%
philippines
7%
scandinavia
7%
india
7%
radar
7%
shape
7%
equator
7%
argentina
7%
weather
7%
bangladesh
7%
canada
7%
vortices
7%
colleges
6%
teaching
6%
Earth and Planetary Sciences
Tornado
100%
Rail
83%
Science and Technology
71%
Cargo
41%
Shape
38%
Good
32%
Passenger
25%
Cumulonimbus Clouds
21%
Whirl
21%
Engine
16%
Maintenance
16%
Locomotive
16%
Wire
16%
Vehicle
16%
Gas Turbine
16%
Term
16%
Water
15%
Service
15%
Steam
15%
Knowledge
14%
Tool
14%
Society
14%
Cyclone
14%
Wind
14%
Cumulus Clouds
14%
Environment
14%
Debris
14%
Funnel
14%
Air
14%
Area
14%
Invention
14%
Condition
14%
Ability
14%
Wind Velocity
14%
Waterspout
14%
Earth
14%
Truck
8%
Electric Battery
8%
Pneumatics
8%
Propulsion
8%
Repair and Maintenance
8%
Alternative
8%
Station
8%
High Speed
8%
Passenger Transport
8%
Spacing
8%
Collection
8%
Rail Transport
8%
Diesel
8%
Rapid Transit Systems
8%
Running
8%
Revenue
8%
Birth Control
8%
Subject
8%
Luminaires
8%
Gravitation
8%
Internet
7%
Investigation
7%
Sum
7%
Pollution
7%
Territory
7%
Productivity
7%
Printing
7%
Wheel
7%
Bioethics
7%
Ideology
7%
Canada
7%
South America
7%
United States of America
7%
Storm
7%
Ball
7%
United States
7%
Uruguay
7%
Republic of South Africa
7%
Japan
7%
North America
7%
Philippines
7%
Weather Condition
7%
Stealth Technology
7%
New Zealand
7%
By-Product
7%
Efficiency
7%
Hook
7%
Ethics
7%
Reflectance
7%
Scandinavia
7%
Technological Process
7%
Spain
7%
Equator
7%
Dust Devil
7%
Pulse Doppler Radar
7%
Whirlwind
7%
Low Pressure
7%
Europe
7%
Northern Hemisphere
7%
Input
7%
Echo
7%
View
7%
Australia
7%
Meteorology
7%
Speed
7%
Prehistoric
7%
Natural Resource
7%
Size
7%
Earth Environment
7%
Guy Wire
7%
Bangladesh
7%
Datum
7%
Vortex
7%
Balkans
7%
Fire Control
7%
Dust
7%
Stone
7%
Time
7%
Communication
7%
Country
7%
India
7%
Risk
7%
Art
7%
Diameter
7%
Effort
7%
Economy
7%
Value
7%
Progress
7%
Argentina
7%
Telephone
7%
Polar Region
7%
Innovation
7%
Social Sciences
Trains
100%
Schools
66%
Maintenance
33%
Technology
27%
Railway
25%
Motor Vehicles
25%
Horse
16%
Economic and Social Development
14%
Control
14%
Machines
14%
Students
12%
Serials
11%
Organizations
9%
Child
9%
Universities
9%
Environment
9%
Process
9%
Transport
8%
Subject
8%
Vehicles
8%
Light
8%
Latin
8%
Water
8%
French
8%
Meaning
8%
Revenue
8%
Birth Control
8%
Alternative
8%
Gases
8%
Materials
8%
Identity
8%
Passenger Transport
8%
Connected Vehicle
8%
Turbine
8%
Support Services
8%
Military Education
6%
Secondary Schools
6%
Teaching
6%
Learning
6%
Education
6%
Formal Education
6%
Government
6%
Invention Process
6%
Private Education
6%
USA
6%
Skills
6%
Knowledge
6%
Social Systems
6%