The TI-83 Plus Calculator by Texas Instruments is a handheld graphing calculator that is powered by batteries. It features a regular display size and key size, making it easy to use for various office tasks. The calculator is from the United States and is a reliable tool for solving mathematical equations and graphing functions. Perfect for students and professionals alike, the TI-83 Plus Calculator is a versatile device that offers a range of features to assist with calculations and problem-solving.