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Computer & hardware
3D
FS Icons Ubuntu
restart, Panel, system
Black
512x512
Desktop apps
3D Cartoon Icons Pack
restart
ForestGreen
300x300
Mixed
The Spherical icon set
weather, Sunny, sun
OliveDrab
128x128
Discovery
32x32
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Free Applications Icons
Bolt, weather, thunder
24x24
on, power, light
Crimson
Business & finance
Phuzion
YellowGreen
Human o2
restart, Reload, system
SandyBrown
Photography & graphic design
Dark Glass
Gold
lightning, quick, restart
SaddleBrown
UI
Nuvola
restart, refresh, tool
DarkGreen
22x22