From Deskthority wiki
PFU Limited is a Japanese computer hardware, peripherals and systems manufacturer, known for manufacturing the Happy Hacking Keyboard. According to the PFU website:
- The company was founded as Unoke Denshi Kogyo in 1960. It was renamed to PFU in 1987 to address its relationship with three companies, Panasonic, Fujitsu, and Uchida Yoko. As of April 1 2010, PFU Ltd. is wholly-owned subsidiary of Fujitsu.
PFU Systems, Inc. is PFU's US subsidiary.