InterfaceEngineering is about creating BusinessValue in activities related to construction of interfaces and services, which can be between human and human, human and machine, or machine and machine.
Human Human interface
Technology and product related'
None better than telephone.
Process related
Modern day governments and corporations, despite well known shortcomings, have managed to shape civilization, culture and values. Have to be awed by achievements of the propaganda machines made possible by these institutions.
Human Machine interface
MicrosoftWay outfoxed by Google.
Machine Machine interface
see WebServices and ApiDesign