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UI
Pixel
Tango
system, out, logout
DarkGray
32x32
Smooth
User Interface Icons
Door, logout, Folder
Gold
80x80
Computer & hardware
Crystal Project
logout
Firebrick
256x256
Futurosoft
off, logout, on
Gray
128x128
3D
Glaze
Exit, logout
IndianRed
64x64
Crystal Clear
logout, star, Ajax
Red