Category:Main topic classifications

This is a list of TechInfoDepot's major topic classifications. These are used throughout TechInfoDepot to organize the presentation of links to articles on its various reference systems, including TechInfoDepot's lists, portals, and categories.

An alternative top-level category to begin navigation of articles, based on a smaller number of initial thematic classifications, is Category:Fundamental categories.

The top level of TechInfoDepot's overall category system, including both articles and other project pages, is Category:Contents.