Sunday, August 18, 2013

Slide rule, the computer before computers

Some people forget that not computers put a man on the moon. Before the era of lightning fast calculations made with the aid of computers engineers used slide rulers.



slide rule


Thursday, August 8, 2013

Calculating the time difference between 2 dates

As a loan shark you give money to people in need, and you need to keep track of the dates when you should go and get your money back.