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Google Suits
google, Setting, optimization
DodgerBlue
512x512
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Business & finance
Glyph
24x24 Free Application Icons
question, about, Book
24x24
talk, Bubble, support
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Network & communications
Pixel
16x16 Free Application Icons
help, mark, Book
16x16
about, help, mark
Message, mark, support
Signs & symbols
3D
Free 3d Glossy Interface Icon Set
about, question, support
64x64
help, support, question
Info, Information, sign
Desktop apps
Free Applications Icons
mark, query, support
Info, mark, about
hint, Info, q and a