I've created a number of LUA files which define the APIs and components in OpenComputers. They're useful as an easier-to-read reference or inside of your favorite IDE for code completion. See the README in the repo for more information.
https://github.com/Pwootage/oc-apis
I'll be continuing to add APIs and components and watching for any issues/pull requests for additional ones. I plan on adding the rest of OC's built-in APIs and several addon mods' as well.