The basics of how technology works in Crusader Kings II is rather simple, but not immediately obvious. If you can't be bothered to read all of this, there's a summary at the end. I'll go into how technology works, and what you can do to maximize your benefit from it. Unlike construction however making progress in technology takes decades, and the effects are tiny in comparison. Much like construction, technology is a long-time prospect. Read more on the paradox forums in the developer diary about the new system. The technology system changed quite a bit with the release of The Old Gods.
