Virtual Slide Ruler
Neat tool if you ever need a Slide Ruler... online. All virtual, double-sided.
<blockquote>The slide rule, also known colloquially as a slipstick, is a mechanical analog computer. The slide rule is used primarily for multiplication and division, and also for "scientific" functions such as roots, logarithms and trigonometry, but is not normally used for addition or subtraction.</blockquote>
