2.1. Types of Topics 
The types of topics include concepts and operating instructions.
| Type of topic | Contents | Title |
| Concept | Explains the "What". | Without a verb as in "Queue Details" or with a gerund as in Displaying Queue Details. |
| Step-by-step instructions | Describes task-oriented application cases – i.e., the "How" – and assumes familiarity with the associated concepts. | Starts with a gerund as in Swapping Panels. |