This is the Aroace usercategory. This category describes a demographic characteristic of the Wikipedians who add themselves.
Userboxes
The following userboxes use Category:Aroace Wikipedians, and inserting them into your userpage will automatically add you to this category:
To add yourself to this category without using a userbox, place [[Category:Aroace Wikipedians|YOUR NAME]] in your user page, replacing YOUR NAME with the name you wish to be listed under (your preferred name). The nameless are listed under U for user.
This category is a self-reference and so is part of the Wikipedia project itself rather than the encyclopedic content.