The thesis is organized in the following sections and posits that Meluhha language speakers followed the spiritual values of Veda cultural traditions, used Harappa Script inscriptions to create data archives of metalwork, accounting for Bronze Age trade transactions 1. Pre-Sanskrit civilization of Meluhha speakers. Harappa Script is hieroglyphic in nature and decipherment can be attempted the way Egyptian hieroglyphs were decrypted 2. Preparation for the decipherment attempt 3. Methodology developed --Harappa Script is mlecchita vikalpa cryptography, uses rebus method of substitution 4. Steps of the Decipherment with illustrations 5. Decipherment. Instances of the decipherment covering all aspects of the matter deciphered. 6. Harappa Script Decipherment in the context of wealth creation, evidenced by Archaeometallurgy 7. Conclusion & Executive Summary 8. Some select Critical comments on the decipherment by other leading experts 9. List of Harappa Script 'text signs' Select inscriptions of Harappa Script Corpora include thumbnail images.