diff --git a/README.md b/README.md
index b4caf51..d309ad4 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,8 @@ The goal is to have only projects that are mostly stable and useful to users.
 * [imjacobclark/Herd](https://github.com/imjacobclark/Herd) — an experimental HTTP load testing application
 * [kbknapp/docli](https://github.com/kbknapp/docli-rs) — a command line utility for managing DigitalOcean infrastructure [<img src="https://travis-ci.org/kbknapp/docli-rs.svg?branch=master">](https://travis-ci.org/kbknapp/docli-rs)
 * [MaidSafe](http://maidsafe.net/) — a decentralized platform.
+* Operating systems
+  * [A comparison of operating systems written in Rust](https://github.com/flosse/rust-os-comparison)
 * [seppo0010/rsedis](https://github.com/seppo0010/rsedis) — a Redis reimplementation [<img src="https://travis-ci.org/seppo0010/rsedis.svg?branch=master">](https://travis-ci.org/seppo0010/rsedis)
 * [Servo](https://github.com/servo/servo) — a prototype web browser engine
 * [uutils/coreutils](https://github.com/uutils/coreutils) — a cross-platform Rust rewrite of the GNU coreutils [<img src="https://travis-ci.org/uutils/coreutils.svg?branch=master">](https://travis-ci.org/uutils/coreutils)
@@ -366,7 +368,6 @@ See also [http://arewewebyet.com/](http://arewewebyet.com/) and [Rust web framew
 * [rust-learning](https://github.com/ctjhoa/rust-learning) — a collection of useful resources to learn Rust
 * [Rustlings](https://github.com/carols10cents/rustlings) — small exercises to get you used to reading and writing Rust code
 * [TeXitoi/benchmarksgame-rs](https://github.com/TeXitoi/benchmarksgame-rs) — Rust implementations for the [The Computer Language Benchmarks Game](http://benchmarksgame.alioth.debian.org/) [<img src="https://travis-ci.org/TeXitoi/benchmarksgame-rs.svg?branch=master">](https://travis-ci.org/TeXitoi/benchmarksgame-rs)
-* [A comparison of operating systems written in Rust](https://github.com/flosse/rust-os-comparison)
 
 ## Development tools