What is the difference between the concepts of "information security", "privacy" and "anonymity"?

Question

Information Security

I often read in the comments on Habré that they say that this or that operating system or application is sharpened not for security, but for privacy. According to commentators, it turns out that "security", "privacy" and "anonymity" are different things. Whereas in my view it is absolutely the same thing.
Help to see the subtle difference between these concepts. Preferably with real life examples.
Thanks in advance.

Answer 1

The authors of articles on Habré themselves do not understand the difference.
Anonymity - on a gay forum no one will know that it is you who are looking for a young trance, they will only see a nickname.
Privacy - Your computer will not transmit any information that will allow anyone to disclose your interest in young shemales on gay sites.
Security - no one will hack into your PC and look into your browser history.