Pretty neat Kickstarter project for an electrical engineers pocket reference. -
https://www.kickstarter.com/projects/nerdonic/cheatkard-electrical-engineering-reference-cards
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Of course the real pros have the information tattooed on the inside of their eyelids. With parallax for that 3D effect.
Augmented reality googles are nice too for this kind of stuff 
You pick up a 0402 cap and it displays its value just beneath it…
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US symbols only, it seems. #FAIL