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Business & finance
Glyph
Math & Business
Face, math, Character
Black
506x512
sign, Character, And
sign, start, Code
creative, sign, true
Mixed
Material Core
sign, warning
512x512
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Network & communications
Communication & Technology
wave, Attention, Error
Octicons
sign, out
sign, In
448x512
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UI
Windows 8 metro style
sign, Equal
WPZOOM Developer Icon Set
sign
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24x24 Free Application Icons
stop, Abort, Block
24x24
forbidden, remove, Minus
Minicons Free
sign, male
43x43
Travel & hotels
DOT pictograms
stop, sign
256x256