Update readme.md

Author: allysonsouza

readme.md

@@ -20,7 +20,7 @@ The plugin will do nothing, so you're able to start developing your functionalit
 ### The functions.php file
 The `functions.php` in the root of the plugin can be used almost like a `functions.php` of a theme. It was built to make easy to anyone familiar with WordPress theme functions to get started. Just put your hooks and callbacks there, and it should work!
 
-### OOP
+### OOP: Object Oriented Programming
 The plugin structure comes with a basic folder structure based on modern PHP development. The folder `/src` is where classes and interfaces should be, subdivided by "domains". For example, the structure comes with `/src/meta-boxes`, in that folder classes related to meta boxes will be placed, like meta box creation helpers, custom meta boxes registrations, etc. 
 
 But, we could have a different approach, understanding domains as a different thing, we could group all classes related to a specific functionality together, even if it means we'll end with classes that deal with meta boxes, custom post types, API's, etc. in the same folder.