By default, a cell reference is relative. For example, when you refer to cell A2 from cell C2, you are actually referring to a cell that is two columns to the left (C minus A), and in the same row (2). A formula that contains a relative cell reference changes as you copy it from one cell to another.
Ever wonder about the history of Segway? Specifically, who invented it, what year, how did it get its name? Many Segway enthusiast and tourists often ask the same question repeatedly, so Prague Segway Tours iSegway (iSegway.cz) will shed some light on the history of Segway PT. Segway was invented by Dean Kamen, and was first shown to the public in 2001 by ABC âs Good Morning America program. It came at a time critical time in American history where the country was still yearning over the tragic events of 911.
2. Garrett Morgan 1877 â 1963. Invented: Gas mask, and a type of traffic light. Garrett Morgan was an inventor and businessman from Cleveland who invented a device called the Morgan safety hood and smoke protector in 1914. On July 25, 1916, Garrett Morgan made national news for using his gas mask to rescue 32 men trapped during an explosion in an underground tunnel 250 feet beneath Lake Erie.