HelenOS sources

KC_N4             129 uspace/drv/hid/adb-kbd/ctl.c 	[0x56] = KC_N4,
KC_N4             153 uspace/drv/hid/atkbd/atkbd.c 	[0x6b] = KC_N4,
KC_N4             142 uspace/drv/hid/usbhid/kbd/conv.c 	[0x5c] = KC_N4,
KC_N4             146 uspace/drv/hid/xtkbd/xtkbd.c 	[0x4b] = KC_N4,
KC_N4             189 uspace/srv/hid/input/ctl/sun.c 	[0x5b] = KC_N4,
KC_N4             187 uspace/srv/hid/input/layout/ar.c 	[KC_N4] = '4',
KC_N4             216 uspace/srv/hid/input/layout/cz.c 	[KC_N4] = '4',
KC_N4             195 uspace/srv/hid/input/layout/fr_azerty.c 	[KC_N4] = '4',
KC_N4             196 uspace/srv/hid/input/layout/us_dvorak.c 	[KC_N4] = '4',
KC_N4             190 uspace/srv/hid/input/layout/us_qwerty.c 	[KC_N4] = '4',