Forth Corporation Public Company Limited (FORTH) was established in 1989 which has registered capital amounting to Baht 1 million. The company purposed to research, develop and manufacture Private Branch Exchange (PBX) under the trademark of FORTH, Printed Circuit Board Assembly (PCBA) and electronic equipment manufacturing.

Then, the company increased capital and expanded into related-business e.g. telecommunication equipment manufacturing and distribution and digital electronic meter manufacturing etc. The company had been listed in the Stock Exchange of Thailand in 2006 and became the public company named Forth Corporation Public Company Limited.