3 We covered a lot of ground here. When you've mastered everything in this Guide,
4 you will have a firm grasp of Rust development. There's a whole lot more
5 out there, though, we've just covered the surface. There's tons of topics that
6 you can dig deeper into, e.g. by reading the API documentation of the
7 [standard library](http://doc.rust-lang.org/std/), by discovering solutions for
8 common problems on [Rust by Example](http://rustbyexample.com/), or by browsing
9 crates written by the community on [crates.io](https://crates.io/).