Separate data busses for each connection

Flight deck and sensors from same vendor

Pilot determines state

Vendor keeps source code and test artifacts proprietary

Aircraft specific hardware and software changes

Complex, highly integrated single applications

Software written for specifichardware

Unified data buses with redundancy

Vendor agnostic including physical interface

Software determines state

Source code and test artifacts shared with customer

Aircraft specific hardware and software configuration

Collection of simple and stand-alone micro services

Software written to be agnostic to h/w and O/S