 Due to the labor-intensive nature of the product, production was carried out in low-wage India which was the key to the company's competitiveness.In the late 1970s, Tandon developed direct equivalents to Shugart floppy drives, and is credited with the invention of DS/DD (double-sided, double-density) versions which became its primary product in the early 1980s.In 1979, Tandon introduced the TM-100 diskette drive, a 5.25" unit with 40 track support as opposed to the Shugart SA-400's 35 tracks.