ROHM’s Compiler Development – Improving Reliability with SuperTest September 8, 2020 Japanese semiconductor company ROHM Co., Ltd. was established in 1958 in Kyoto and has since come a long way. The company was named ‘ROHM’ after the letter ‘R’ in its original main product, resistors, plus ‘ohm’, the unit of resistance. In line with the company’s mission of ‘Quality is First’, the R now also stands for ‘Reliability’.