I am used to see, but not many use me anymore. In one eye and not the other, I'm tied to the Mandela effect..oh brother

Your teacher once said you'd never have one handy, but it's built right into your phone, isn't that dandy? I help make sure your answer is right, and even geniuses understand my might.

I can connect your bones and connect your pipes. I can also be passed around and give you good vibes.

I can be an affordable meal to millions across the land. I can be a nuisance to millions of computers across the globe. What am I?

Sweating and thinking, you’re in a state! No need for a cup, fork, or plate. Nervously simmer large chunks of thought. You sit and brood, while I sit in a pot.