To cut down on clutter and give the feed more room to breathe, navigation elements on the left have been slimmed down to a narrow black column of icons, similar to the mobile interface.

CNN: Facebook revamps site, tweaks mobile apps

As the passage implies, even something as seemingly simple as an airplane flying in the sky is actually just one part of a large sociotechnical system composed of various human and machine elements, from the pilot and airplane to a series of airports, communication and navigation systems, bureaucracies, regulations, rules and norms of flight, and more.

FORBES: A Domain Like Cyberspace