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Computer & hardware
3D
Discovery
calculator
DarkSlateGray
32x32
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UI
Glyph
Freecns Cumulus
Black
512x512
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Mixed
Rubber icons
calculator, Calc
Firebrick
192x192
Photography & graphic design
Smooth
Adore
DarkOliveGreen
118x118
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Education & science
Handdrawn
Brainy Icons Free — 36 Science and Education Icons
calculator, numbers, calculate
64x64
hand drawn, calculator, numbers
Desktop apps
Flat
Simply 8-bits #2
96x96
WPZOOM Developer Icon Set
Tango Icon Library
calculator, Accessories
Gaming & gambling
Free Game Icons
Money, numbers, Abacus
DarkKhaki
Photorealistic
48x48 Free Object Icons
study, subtract, estimates
LightGray
48x48
Business & finance
Pixel
24x24 Free Pixel Icons
Gainsboro
24x24
24x24 Free Application Icons
SkyBlue
Network & communications
16x16 Free Application Icons
Lavender
16x16
20 Flat Icons
Calc, math, calculate
Silver
96x128
Mobile apps
Apple iOS 7 icons
DarkOrange
Outline
Wirecons Free Vector Icons
divide, math, plus
iOS 7-inspired Mac icon set
1024x1024
Pittogrammi
Devine Icons Part 2
128x128
Squareplex
DarkGray
Plex for Android
Crimson
