I have no idea what "OSB" is supposed to mean.

Olin Lathrop‭ Oriented strand board https://en.wikipedia.org/wiki/Oriented_strand_board, seems like a common enough term. Similar to particle boards but a different flavour.

Thank you, Lundin!

See also: https://proposals.codidact.com/posts/289371

Also, and I mean no disrespect Olin Lathrop‭, but if you truly don't have any idea what OSB could possibly mean, it would seem that the question is far outside your areas of interest and I would expect that you ignore it. So what exactly is the harm being done here?

Maybe I could answer it if I knew what OSB meant. But the broader point is that undefined abbreviations don't belong here unless they are very very common and universal. Specialized jargon is OK on specialized sites. However, "home improvement" is a broad category, and this site is international. OSB isn't common and universal enough that it doesn't need defining at the first use.

This site also isn't just for getting answers to questions. You want people be engaged and feel the site is interesting, even when it's not about some niche they care much about. An extra two seconds to put three words in parenthesis after the first use of an abbreviation is a simple and low cost way to make more feel welcome without detracting from the site.

By the way, I have definitely used OSB before, but at least where I bought it (New England), it was called just "particle board". Too often abbreviations people think are universal are actually quite regional.

Funnily enough, I also used to call it "particle board" (and "was-wood"). More recently I found out that "particle board" is actually a completely different thing. So now I feel like I should be saying OSB specifically.

For the record we have the same abbreviated term in Sweden too, even though it's an English abbreviation. Which in turn suggests that it is indeed a common and potentially universal abbreviation.

Olin Lathrop‭ Since we have now established that OSB stands for oriented strand board, and since you appear to have knowledge of this material, would you like to post an answer to the question?

I still think the question should be fixed to explain OSB. You've explained it to me, but not to everyone else that sees the question. By the way, the obvious answer is plywood. That's what we used to use before OSB was available.

Very well, I've added a note to the question as well. Feel free to use the "edit" link if you'd still like something to be changed.

By the way, the obvious answer is plywood.

Well, I don't think so. The question is asking for alternatives to engineered wood, and plywood is a type of engineered wood.