Numbers: from petroglyphs to universal code Introduction: The number as a cultural artifact Numbers, unlike the abstract concept of number, are visual signs (symbols) for recording numbers. Their history is the history of the search for the optimal method of fixing quantitative data, closely related to the development of writing, trade, astronomy, and state administration. The evolution of digital systems reflects the key intellectual breakthroughs of humanity: from concrete counting to abstraction, from additive principles to positional, and finally to global standardization. Paleolithic origins: accounting and abstraction The first predecessors of numbers appeared in the Paleolithic era (e.g., the Ishango bone, ~20,000 years BC) in the form of notches that allowed for the lunar calendar or accounting of hunting. A crucial stage was the invention of clay tokens in Mesopotamia (~8000 BC) — specific figures representing units of goods (one ball — a sheep, cone — a measure of grain). This was a system of concrete counting where the symbol was identical to the object. The transition to abstract recording occurred when tokens began to be impressed on clay tablets, leading to the appearance of the first digital signs in Sumerian cuneiform (~3000 BC). Here, a sexagesimal system (base 60) was developed, traces of which survive in our division of time and angles. Interesting fact: The Ancient Egyptian hieroglyphic system (~3000 BC) was decimal but non-positional: numbers were written as a combination of signs for powers of 10 (unit — a stroke, ten — a bracket or arch, hundred — a rope). To represent 3, three strokes were drawn, and for 300 — three symbols of rope. This made the records cumbersome. The key revolution: the positional principle and zero The revolutionary discovery — the positional (local) numeral system, where the value of a digit depends on its position in the number, — was made independently in two civilizations. Babylonian mathematics (by 2000 BC) used the ... Read more