NASA Graphics Standards Manual (nasa.gov)

Vaguely related, the technical writing style manual from NASA: http://hdl.handle.net/2060/19900017394

It's of course opinionated, but for anyone who is not an opinionated pro themselves, it's a great resource to learn concise, precise, and readable technical communication. (imho, of course)

And to think this would have been put together in the pre-PC/desktop publishing era. Total gem.

If you're interested in a hard copy, these guys did a beautiful print run of it:

https://standardsmanual.com/products/nasa-graphics-standards...

It's super retro, but part of me kind of likes the NASA "worm" logo over the "meatball".

https://en.wikipedia.org/wiki/NASA_insignia

(1976)