Willigot T. Odhner may not be on the top of your Halloween Costume lists - he may not even be someone you have heard of before, but 121 years ago Willigot T. Odhner was granted a patent for a calculating machine that performed multiplications by a process of repeated addition.

This is just one of a year’s worth of historical tidbits that can be found on the Computer History Museum’s online calendar.

For copyright reasons I cannot display Willigot T. Odhner’s image here, but it does appear on his …