Keywordscompleteness; constructivism; decidability; openness; procedure; system; uniqueness; black box; classicality; environment as witness; Landauer’s principle; pragmatic information; quantum Darwinism; separability; superposition; time; emergence; uniqueness; existence of solutions; input/output system; system specifications; Discrete Event System Specification; System of Systems; design; subject-orientation; communication structures; collaboration network; interaction; diagrammatic specification; design patterns; choreography; neural nets; spiking neurons; xor problem; input/output system; system specifications; Discrete Event System Specification; Reaction Networks; System Theory; Chemical Organization Theory; emergence; context; meta-structure; systems thinking; systems science; systems practice; way of thinking; world picture; world-view; integrationism; emergentism; synergism; network on chip; switch and adaptive-routing; event-B formalism; formal proof; correct-by-construction; n/a; reaction networks; chemical organization theory; system theory; emergence; structural change