What is expo?

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So there is a bus stop “international district, expo New Mexico”. As I didn’t know the word expo, I couldn’t really hear what word it was. All I heard was

a) reference to the whole state rather than a city which sounded like it was something big

b) A really happy voice announcing it which also made it sound that way

It took me a month of trials and errors on google to finally figure out that the word is expo and it refers to cultural fair. I just figured it out 5 minutes ago.

But now the new question. What is the linguistic origin of the word expo? Is it some sort of abbreviation or what?

As a mathematician, I know the word exponential. The fact that expo sounds like a derivative of its root, is it just a coincidence or no?

Expo frequently means exposition. In this case, it looks like it's a fairgrounds type place, so exposition (in the sense of the exhibit of goods & technology) makes sense. The World's Fairs were expos.

Googling the origins of exposition & exponent shows they are not related.

You might see this reference as interesting. It seems that expositions derives from "exhibits" as nations demonstrated their industrial achievements.

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

It is the state fair (an exposition) https://www.exponm.com/

Thank y'all for answering my question. I got off that stop yesterday and in fact found the expo sign. I didn't have time to go in though, as I have a meeting with my thesis advisor tomorrow. But perhaps I will go tomorrow after the meeting or something like that.