Must-read whitepapers (Design)

I am looking to do light reading over the summer.

What are must-read whitepapers on design?
Examples: the 233 telescoping arm, intake, etc.

Thank you.

We’ve complied a list of recommend readings on our website, many of them are about robot design.

http://www.spectrum3847.org/recommendedreading

Great list. Some of these are common and referenced regularly on CD but others are completely new to me. Bookmarked.