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Mixed
Smooth
Tango Icon Library
Lock, screen, system
Black
512x512
Log, out, system
DarkGray
system, search
shutdown, system
WhiteSmoke
preferences, system, session
SteelBlue
manager, File, system
DarkGoldenrod
system, Proxy, preferences
software, update, system
preferences, windows, system
monitor, system, Utilities
system, Installer
system, Users
system, Applications
preferences, system
Emblem, system
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48px web iconset
system
48x48
system, Monitoring
DarkSlateGray
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Some icons
Computer, system, monitor
80x80
Humility
LightSlateGray
24x24
Carpelinx
system, package
Gray
64x64