The idea stems from the fact that the initial currency minted by an Islamic government was that of the gold Dinar and silver Dirham. It was the Caliph Abdul Malik ibn Marwan who ordered the minting of these currencies in the year 76 AH. In Modern day Currencies also using  Symbols .  When discussing Currency symbols Dirham still lacks popular identification symbol .So Dean of Oxhar Created a Symbolic id for Dirham