S. Rangarajan, who wrote under the pen name, Sujatha, was known for his versatility in writing. He played a significant role in taking information on trends in science and technology to the common man through his simple articles. An engineer, Sujatha was instrumental in designing and producing the Electronic Voting Machine which
was used first at the time of Padur by-elections (Kerala) successfully when he was working with Bharat Electronics.
His series and columns for Tamil weeklies such as Ananda Vikadan, Kumudam and Kalki were widely read and got him numerous fans in all age groups. He had drawn thousands of youngsters to Tamil literature with his modern and engaging style. He encouraged the new comers and even guided them to write proper way which is a very rare phenomena in Tamil literature.