Repository: a collection of computer code for a software program (or app if you insist).

Fork: a copy of a repository so you can edit it without affecting the original.

Pull request: a request to the owner of a repo to bring in some changes you made in a fork.

I think I even got the word count down.

Why even bother explaining those terms if you only have that much screen space.

You'd probably spell words correctly though, right?

Repository: a collection of related computer code, like related files in a filing cabinet

Fork: a copy of a repository at a certain point in time, like a fork in the road, they diverge from that point

Pull request: a request that a repository owner incorporate your changes into their files.