Published in Mirabilia Journal 

Keywords: Keywords: Abacus Schools, Accounting, Economic History, History of Education, History of Mathematics, Linguistic Evolution.

Abacus schools are fundamental for mathematical, geometric and economic literacy as well as for the scientific development of these disciplines with their own sectorial language and style. The Abacus treatises constitute the basis of a solid administrative, accounting and commercial training. In a fruitful exchange with all expressions of society, they become the main engine for the consolidation of a new linguistic koiné.