more generally; but you can assume that what we're talking about always works more
specifically in OCaml.
-It's helpful if in addition to OCaml you also install the Findlib add-on and/or the OPAM "package manager."
+It's helpful if in addition to OCaml you also install the Findlib add-on and/or the [OPAM](https://opam.ocaml.org) "package manager."
These will make it easier to install additional add-ons further down the road.
However, if you're not able to get them working, don't worry about it much.