One of my pet peeves is people using the letter "u" to mean micro. Its a greek letter mu, "μ", and seeing as the entire thing is capitalised here, it could also be "Μ" (uppercase greek mu, not uppercase latin M)

The problem is that µ is usually hard to type (unless you have a Greek keyboard or a custom keyboard mapping). This said, although I tolerate stuff like "47 uF" in electronic schematics (also because legacy software didn't even allow the µ symbol), I definitely find horrible to see stuff like "us" instead of "µs" in an article.

I just googled it to type my comment. And if you're using it enough to need quick access, you can do alt + 0181 on your numpad on a windows system

As a (very) frequent "µ" user (and several others like ± and Δ and °) I've had the alt codes memorised for ages but having recently, out of necessity and a bit of a nomad lifestyle, moved to a "tenkeyless" keyboard (the horror), I simply macroed it, but I find it refreshing that some keyboard layouts simply include it. I have an obscure pocket 8-bit with an even more obscure OS written in Sweden that also has µ.

And it's option-m on a Mac.

... that's weird. It's alt gr+ m on every recent finnish keyboard, apparently it's not on us ones?