The world runs on standards that define everything. Unfortunately these standards are proprietary which is highly inconvenient.
Where would one obtain standards namely international standards (ISO) and Australian standards (AS). Some can be found on the internet archive but a majority cannot. I believe some libraries let you download some version with all sorts of drm but that’s not something I want to deal with.
How hard can it be to get a pdf that defined how literally everything in the world works.
EDIT: I have checked Library Genesis it has some but not all.
I can usually find ASME and ISO standards by just googling the standard’s name and revision with PDF at the end. Usually works pretty well. Aerospace stuff is harder to find to be honest. I’d give the other suggestions a shot.