The first tool was the hand axe, which is a stone tool, made by chipping a stone with another stone to obtain the desired shape and edge (hence, the Stone Age).

The most effective tool for gas mileage comparisons is at gasmycar dot com. That site has the best tool for doing this type of research and information desired.

Structured data analysis is a research tool used to study the generation gap. The tools can be customized to extract the information desired.

A method or process used to achieve a desired result.

The web site 'TimeandDate' has a time zone converter tool. One enters the time of origin and the location of desired location. The tool will automatically give the corresponding time. The tool covers time for all over the world.