Category Tree details how articles in Titannica are organised into the following categories: NOTE: Titannica is the top level category under which all others are collected. The categories within Titannica are a mixture of 'in-universe' (from a Titan perspective) and 'meta' (from a real-life perspective) categories. In most cases the area to which they belong (i.e. 'meta' or 'in-universe') is obvious. However, in some cases this is not so. In particular the Category:Miscellaneous is an extremely useful 'in-universe' category containing many useful sub-categories about the world of Titan.