[fowl2]

There is a distinction in the dotnet world too. The docs[1] seem to refer to ABI as "Binary compatibility" and API "Source compatibility".

Jon Skeet has some good examples [2]

[1] https://learn.microsoft.com/en-us/dotnet/core/compatibility/... [2] https://codeblog.jonskeet.uk/2018/04/13/backward-compatibili...