This document is an assignment submitted by Moin Sarker and Melon Fakir to their instructor Priyanka Das Dona at World University of Bangladesh. The assignment analyzes the evolution of money throughout civilization, from early barter systems and commodity currencies to modern forms of fiat currency like coins, paper notes, plastic cards, e-money and mobile money. It discusses the history and types of money, how money functions in an economy, and the flow of money circulation. The assignment provides an overview of how money has developed from early non-monetary exchange methods to the various representative and fiat forms of currency used around the world today.