When I was in college, a friend gifted me with a old slide rule (German make), but it was missing the slider scale. I created that slider by cutting a stripe ou

When I was in college, a friend gifted me with a old slide rule (German make), but it was missing the slider scale. I created that slider by cutting a stripe out of my plastic shoe box. Worked like a charm. I think Slide rule is an amazing invention, for it's simplicity and vastness of calculations that can be done.