Since the foundation of Hosan Corporation in 1979, the business has been expanded from general trading business into manufacturing the products related to rolling stock such as Sliding Plug Doors, Vacuum Toilet System, Electric Board, Speed Recorder, Anti-Skid Unit including Bus Toilet System, and environmentally friendly products like Super-Kompostar which is recycling or reducing the quantity of food wastes. Besides, we have opened the market for electronic organizer and dictionary developed with our own technology by undertaking PenMan Corporation which was specialized in R & D for computers and electronic systems with the enthusiasm of new technology and electro-mechanics.