This article reminds me of something I'm wondering about for too long now. What is the meaning of the below terms (possibly in various contexts). - abstractio

This article reminds me of something I'm wondering about for too long now. What is the meaning of the below terms (possibly in various contexts). - abstraction - indirection - encapsulation - information hiding How do these relate to and differ from each other? I feel these get conflated a lot. Would be nice to tell them apart.