The I Ching (Book of Changes) and it's 64 hexagrams are an ancient Chinese divination system thought to pre-date recorded history. From Wikipedia: "The text of the I Ching is a set of oracular statements represented by 64 sets of six lines each called hexagrams (卦 guà). Each hexagram is a figure composed of six stacked horizontal lines (爻 yáo), each line is either Yang (an unbroken, or solid line), or Yin (broken, an open line with a gap in the center). With six such lines stacked from bottom to

The I Ching's 64 Hexagrams as a Pre-Leibniz Binary System for Cosmic Data Storage | Creative Creature