Thematics SA facilitates bringing  like-minded collectors (as far as their themes are concerned) in contact with each other. Where such groups become large enough, they are encouraged to organise themselves into interest groups (study units) under the umbrella of Thematics SA. Any collector wanting to join such an interest group is welcome to do so, provided that they are paid-up members of Thematics SA. Although the Executive will be involved in initiating these groups, their survival will depend on the willingness of the members (or one member) to take the lead in these groups.
This section deals with:
* the interest groups already in place and functioning;
* possible interest groups to be established in the future; and
* an established list of themes and theme codes (as used by the American Topical Association)