This classification is often subdivided into two separate categories for para-Alpine skiing.

The chart then subdivides each of the three major categories into many other categories of human understanding.

The bioinformatics tools and applications are subdivided into three main categories.

Reserved matters are subdivided into two categories: General reservations and specific reservations.

Microthermal climates are typically subdivided into three categories based on the temperature characteristics of the summer season.

Combat is subdivided into three main categories: melee, magic and ranged.

Each of these three areas is subdivided into three categories, all designed to support the agency's law enforcement goals.

Contact extensometers have been used for many years and are also subdivided into two further categories.

Legal analysis systems can be further subdivided into two categories: judgment machines and legal expert systems.

Most commonly, 11 different types of cannon shot is available, and this can be subdivided into 3 distinct categories: