Some other examples of where information can be extracted from data include:

• Test scores, learning artifacts and plagarism software used to make judgement using machine learning.
• Information surreptitiously shared when using various apps on a smartphone. Even de-identified data can leave a trace.
• Facial recognition taken from CCT cameras, so of which are open and public.
• Wearables and the plotting of location data, including secret US Army bases.
• Genetics tests potentially used to identify supposed taste in music or links to a crimes.