Edge-Reversal Dynamics; Introduction: SER Origins and Neighborhood Constraints; Sequences of Acyclic Orientations; Neighborhood-Constrained Systems: Resource-Sharing Systems; Partially Concurrent Networks of Automata; Scheduling by Edge Reversal: Main Properties and Special Cases; Attractor Dynamics and Concurrency; The SER State Space: Enumerating Graphs and Acyclic Orientations; Some Statistics and Correlations; The Atlas; All Graphs on Six Nodes; All Trees on Seven Nodes; All Rings on up to Eight Nodes