* [sun_usb](converter/sun_usb/) - [Sun] to USB(type4, 5 and 3?)
* [pc98_usb](converter/pc98_usb/) - [PC98] to USB
* [usb_usb](converter/usb_usb/) - USB to USB(experimental)
+* [ascii_usb](converter/ascii_usb/) - ASCII(Serial console terminal) to USB
### keyboard
* [hhkb](keyboard/hhkb/) - [Happy Hacking Keyboard pro][GH_hhkb] **my main board**