The Australia Project has a number of categories under the category Australia, Immigration relating to the classification of immigrants to Australia, eg. Assisted, Unassisted, Bounty or Free Settlers. Some have a number of sub categories. These categories were generally created a number of years ago.
A member choosing these categories from the category picker tool in edit mode on a profile, may not realise these categories related to Australia.
To provide clarity, I am progressively adding "to Australia" to the names of these categories. You may see or have seen the changes on profiles.
Margaret Haining, Categories team leader, Australia Project