visual(s) -- method(s) / diagram(s) / maze(s) / tit-for-tat / graph(s) /

_ .. / machine(s) / art(s) / change(s) / human(s) / world(s) / _ / .

social(s) / class / love story [ 1 2 3 4 ] (JvA)

/ play / reading(s) / program(s) / math(s) / flow(s) / cycle(s)