Help:Categories

Why put an article in a category?
At some point it becomes useful to classify the information according to categories. For instance, you might want to add an article on acute MI to the category of cardiology. Acute MI would then be included with all the other articles related to the subject of cardiology in this category. All the articles in a category can come together to forming a living textbook of a given topic.

How to put an article in a category
To add an article to a category, simply add (for each category) a line as follows:

Typing this:

Adds the page to the Category of Cardiology chapters.

It is convention to insert these lines near the bottom of the wiki page. Once your edit is saved, the category will exist and add the article you just edited will be added to it.