Interaction with the Real Filesystem?

Is there a way to get data from a ComputerCraft device into the filesystem of the actual computer that is running Minecraft? I would like to be able to save my interactively-debugged Lua code back to my real computer, so that I can start using version control…

Split into new topic.

If you're playing on a server, ask the server admin. If you're playing locally, go to /saves/yourSaveName/computer and find the correct computer ID folder.