atom
building
business
chemical
company
construction
corporate
ecology
economy
energy
engineering
environment
equipment
factory
heavy
icon
industrial
industry
information
innovation
investment
key
labor
line
machinery
manufacture
manufacturing
market
marketing
metaphor
nuclear
oil
petrochemical
pictogram
pipe
plant
pollution
power
production
quality
refinery
secret
service
silhouette
strategy
success
supply
symbol
technology
thin