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Communications
Flat
eCommerce
protest, Communications, announcer
DarkSlateGray
512x512
Transportation
Shopping and retail
Automobile, Car, Discount
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Oxygen
speaker, voice, advertizement
128x128
Mobile apps
Glyph
app types in grey
Discount, offer, sale
Network & communications
Smooth
blog, megaphone, Promotion
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UI
3D
Crystal Clear
Promotion
12x12