A graphing calculator is a handheld device that allows users to plot graphs, solve equations, and perform complex calculations. Unlike standard calculators, graphing calculators can display multiple functions on a coordinate plane, making them useful for visualizing mathematical concepts. They are commonly used in subjects like algebra, geometry, and calculus. These calculators often come with features such as programmable functions, statistical analysis tools, and the ability to handle variables. Popular models include those from brands like Texas Instruments and Casio. Graphing calculators are essential tools for students and professionals in fields that require advanced mathematical computations.