It depends what you mean by used. I wrote a system which learns what things are discussed: https://metacortex.me/ https://metacortex.me/ If it's discussed it

It depends what you mean by used. I wrote a system which learns what things are discussed: https://metacortex.me/ https://metacortex.me/ If it's discussed it is tracked. A simple demo is: https://hnprofile.com https://hnprofile.com If you're intested in tracking software there is data dog (I believe it's called). It logs running software