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Business & finance
3D
Real Vista 2
Chemistry, Allergy, test
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400x400
Shopping & e-commerce
Sophistique
test, Chemistry, science
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Desktop apps
Free Applications Icons
document, Formula, retort
24x24
Computer & hardware
Human o2
lab, Chemistry, test
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128x128
Smooth
Woothemes Ultimate Icon Set
Chemistry, tube, science
Network & communications
Oxygen
Chemistry, test, flask
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ASP.NET icons
research, Chemistry, test
RoyalBlue
16x16