HelenOS sources
KC_N5 130 uspace/drv/hid/adb-kbd/ctl.c [0x57] = KC_N5,
KC_N5 154 uspace/drv/hid/atkbd/atkbd.c [0x73] = KC_N5,
KC_N5 143 uspace/drv/hid/usbhid/kbd/conv.c [0x5d] = KC_N5,
KC_N5 147 uspace/drv/hid/xtkbd/xtkbd.c [0x4c] = KC_N5,
KC_N5 190 uspace/srv/hid/input/ctl/sun.c [0x5c] = KC_N5,
KC_N5 188 uspace/srv/hid/input/layout/ar.c [KC_N5] = '5',
KC_N5 217 uspace/srv/hid/input/layout/cz.c [KC_N5] = '5',
KC_N5 196 uspace/srv/hid/input/layout/fr_azerty.c [KC_N5] = '5',
KC_N5 197 uspace/srv/hid/input/layout/us_dvorak.c [KC_N5] = '5',
KC_N5 191 uspace/srv/hid/input/layout/us_qwerty.c [KC_N5] = '5',
HelenOS homepage, sources at GitHub