This paper endeavours to identify the sources of Urdu script through a comparative study of the letters and features of various scripts. To this end, not only have the views of researchers and historians been extensively consulted, but the fundamental principles of linguistics have also been taken into account. The Urdu script passed through several stages before being evolved into its present state. A brief introduction of the Semitic script, Ārāmī, Nabṯī, Kūfi, Naskh, Ta‘līq, and Nasta‘līq has been given. The author concludes that the Urdu script is not new; it is a modification of Semitic script.