HD System Co., Ltd. manufactures single tube-type shock absorbers, in particular for Japanese motors (20 kinds). The company operates a quality management system which is certified by ISO 9002 standards. HD also acquired QS 9000 for its products, around 70 percent of which are exported to Japan, USA, and Canada.   Much of the company's expertise in the field is a result of co-operation with former employees at KATIC, a well-known and experienced single tube-type shock absorber manufacturer.   Established in 1997, HD System Co., Ltd. has a workforce of 30 and annual sales revenues in excess of USD500,000.