The Texas Instruments TI-89 Graphing Advanced Calculator is a handheld device with a regular display size and key size. It is designed for graphing and features calculus capabilities, making it useful for students and professionals in various fields. This model is programmable and powered by batteries, providing convenience and flexibility for users. Made in Taiwan, this unit is a reliable tool for solving complex equations and creating graphs with ease. The calculator comes with a cover for added protection and portability.