Icons made by <a href="https://www.flaticon.com/authors/freepik" title="Freepik">Freepik</a> from <a href="https://www.flaticon.com/" title="Flaticon"> www.flaticon.com</a>

CPU 
https://www.flaticon.com/free-icon/cpu_124138

Wrench
https://www.flaticon.com/free-icon/settings_675630

Repair
https://www.flaticon.com/free-icon/repair_675609

Book
https://www.flaticon.com/free-icon/book_2446822?term=new%20library&page=1&position=1

plug 
https://www.flaticon.com/free-icon/tools-and-utensils_453641?term=connector&page=1&position=4

fullscreen 
https://www.flaticon.com/free-icon/expand_853637?term=fullscreen&page=1&position=11

trash 
https://www.flaticon.com/free-icon/trash_2496733

expand
https://www.flaticon.com/free-icon/expand_853925

pin 
https://www.flaticon.com/free-icon/placeholder_684908?term=map%20pin&page=1&position=21

wrench2
https://www.flaticon.com/free-icon/wrench_2593065

Formula 
https://www.flaticon.com/free-icon/formula_1178213?term=variable&page=1&position=30

Add
https://www.flaticon.com/free-icon/add-file_1151197?term=new%20file&page=1&position=18

Ruler 
https://www.flaticon.com/free-icon/ruler_232898
Icons made by <a href="https://www.flaticon.com/authors/smashicons" title="Smashicons">Smashicons</a> from <a href="https://www.flaticon.com/" title="Flaticon"> www.flaticon.com</a>

Geometry
https://www.flaticon.com/free-icon/set-square_232961

Info 
https://www.flaticon.com/free-icon/information_1973275?term=help&page=1&position=11

Save
https://www.flaticon.com/free-icon/floppy-disk_3076408?term=save%20file&page=1&position=10


Zoom icon
https://www.flaticon.com/free-icon/zoom_1341098?term=zoom%20in%20lens%20flat&page=1&position=20

Zoom out - minus
https://www.flaticon.com/free-icon/zoom-out_1341073

Target 
https://www.flaticon.com/free-icon/target_1341112