I also have a hard time understanding abstract things without clear examples. I think that's the difficulty you're having? This SO question has many answers th

I also have a hard time understanding abstract things without clear examples. I think that's the difficulty you're having? This SO question has many answers that are a bit more concrete with the examples: https://stackoverflow.com/questions/3784389/difference-between-api-and-abi https://stackoverflow.com/questions/3784389/difference-betwe...