The plural of apparatus is apparatuses

guides/source/getting_started.md

@@ -145,7 +145,7 @@ application. Most of the work in this tutorial will happen in the `app/` folder,
 |Rakefile|This file locates and loads tasks that can be run from the command line. The task definitions are defined throughout the components of Rails. Rather than changing Rakefile, you should add your own tasks by adding files to the lib/tasks directory of your application.|
 |README.rdoc|This is a brief instruction manual for your application. You should edit this file to tell others what your application does, how to set it up, and so on.|
 |script/|Contains the rails script that starts your app and can contain other scripts you use to deploy or run your application.|
-|test/|Unit tests, fixtures, and other test apparatus. These are covered in [Testing Rails Applications](testing.html)|
+|test/|Unit tests, fixtures, and other test apparatuses. These are covered in [Testing Rails Applications](testing.html)|
 |tmp/|Temporary files (like cache, pid and session files)|
 |vendor/|A place for all third-party code. In a typical Rails application, this includes Ruby Gems and the Rails source code (if you optionally install it into your project).|