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Network & communications
Pixel
16x16 Free Application Icons
Caution, warning, danger
DarkSlateGray
16x16
Social media
3D
Professional Toolbar Icons - free
system, weapon, tributary
Black
64x64
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Business & finance
Glyph
Minicons Free
weapon, Rocket
45x45
Photography & graphic design
Dark Glass
Battleship, weapon
128x128