HelenOS sources

PERIOD            131 uspace/lib/usbhid/include/usb/hid/usages/kbdgen.h USB_HIDUT_KBD_KEY(PERIOD, 0x37, '.', '>', 0, 0);
PERIOD            162 uspace/srv/fs/udf/udf_osta.c 		if ((current == PERIOD) && ((udf_len - idx - 1) <= EXT_SIZE)) {
PERIOD            243 uspace/srv/fs/udf/udf_osta.c 			new_name[new_idx++] = PERIOD;