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Education & science
Handdrawn
Brainy Icons Free — 36 Science and Education Icons
education, hand-drawn, paper
Black
64x64
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Gaming & gambling
3D
Free Game Icons
Money, numbers, Abacus
DarkKhaki
school, bell, Golden
Avatars & smileys
Free Large Boss Icon Set
Library, education, librarian
512x512
Photography & graphic design
32x32 Free Design Icons
Book, learning, study
32x32
Photorealistic
48x48 Free Object Icons
degree, Academic, pass
48x48
reading, bookmark, learning
UI
Glyph
Windows 8 metro style
school
DarkSlateGray
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Recreation & hobbies
Maki
Pretty Office 10
school, Boy, Bag
SteelBlue
Signs & symbols
Free 3d Glossy Interface Icon Set
school, tools, scissors
Book icons
Blue, school, Address
BurlyWood
Sketchy icons
128x128
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Mixed
Pixel
Koloria icons pack
school, Book
SandyBrown
28x32
Interior & buildings
3d houses
Building, school
256x256
Computer & hardware
Icons Unleashed Vol. 1 - Computer Hardware
learn, school, study
SaddleBrown
WooCons #1
Board, chalkboard, school
DimGray
Business & finance
Arzo
Books, school
Purple
Sunny Day
Campus, kiosk, Library
400x400
Shopping & e-commerce
Vista
school, Elementary
Near
school, Books
170x170
Cartoon
Oxe Set
teach, school, Black board
Smooth
Simplicio
school, Manage
IconFinder Pixel
Course, training, education
SlateGray