What's an "interface"? Obviously "file" is also just an abstraction but it has familiar semantics (read, write etc). From cursory reading it seems that an inte

What's an "interface"? Obviously "file" is also just an abstraction but it has familiar semantics (read, write etc). From cursory reading it seems that an interface is just a specification for (remote) procedure calls. Also reminds me of microkernel IDLs https://www.gnu.org/software/hurd/idl.html https://www.gnu.org/software/hurd/idl.html