What Happened on December 15th

Hollerith Electrical Printing and Tabulating Machine
Hollerith Electrical Printing and Tabulating Machine
 
Hollerith Agrees to Supply Machines for Russian Census
Hollerith’s Census Machine was first employed by the US Census Bureau in 1890 as the result of a crisis in counting a rapidly-increasing US population. Methods based on Hollerith's machine served for almost 60 years until the Bureau adopted electron.