10 December 2003; 21 years ago (2003-12-10) (HHKB Professional first-generation) 24 March 2006; 18 years ago (2006-03-24) (HHKB Professional second-generation) The Happy Hacking Keyboard (HHKB) is a small computer keyboard produced by PFU Limited of Japan, codeveloped with Japanese computer scientist and pioneer Eiiti Wada.

It returns the control key to its original position as on the early 84-key IBM Personal Computer/AT and XT layouts.

It used PS/2, Sun, and ADB interfaces to connect to a computer with a detachable cable and is only available in white.

The HHKB Professional 2 was released in March 2006 and is also available in either white or charcoal (black) with either blank or printed keycaps.

Its main feature is a built-in 2-port USB hub for connecting mice and other peripherals.

However, unlike the HHKB Professional BT, these models can also be used with a wired connection via the USB-C port.

HHKB Professional Hybrid models also support PFU's official key remapping software.Some of the Happy Hacking Keyboard design tenets, as dictated by Wada, include a minimal 60-key design, no cursor or function keys, and standard keyboard pitch, all optimized for use in Unix environments.