Before World War II, IBM made accounting machines (sort of pre-computers) that operated by means of punchcards, along with collators and math. In 1944, the Japanese military confiscated existing IBM machines from Japanese insurance companies and assigned junior officers to predict B-29 attacks using this. They successfully predicted B-29 raids about 80% of time. Obviously, we can't say exactly how many B-29s were shot down by this foreknowledge, but certainly some. They actually broke the code for Bock's Car and the Enola Gay and knew when they were coming. Of course they didn't know what was being delivered.