Telephone area codes are used to help route phone calls to the correct location. Find North American area codes and their corresponding locations with this handy area code chart.
The United States Postal Service recognizes two-letter state postal abbreviations when specifying a postal address. Other common postal abbreviations are listed and defined on this chart.
Locate cities of the Middle East on this map, and find a chart featuring the area, population, currency, capital city, and time zone of countries in the Middle East.
Barographs record the atmospheric pressure over the course of time. A traditional barograph, such as this one, contains an aneroid barometer and uses a pen to produce a paper chart, called a barogram.
A young female optometrist holds a pair of wire frame glasses in front of her, inviting her patient to try them on. As the patient fits the glasses to his or her head, the eye chart in back of the optometrist will come into focus.
A family tree is also known as a pedigree chart, which is a chart that represents family relationships. The term comes from the tree-like structure of the chart.