National Institute of Standards and Technology
This is the site you’ll want to use when making any authoritative argument in life. The people who make the stuff that makes our world work (like the internet and electricity) all take their marching orders here.
It’s a deep, deep dive but well worth it. You might not ever get through it all, but it’s nice to know the reference is there when you need it.
Don’t say I didn’t warn you and have fun!