The Texas Instruments TI-89 Titanium Graphing Calculator in black is a reliable and efficient tool for solving complex equations and graphing functions. With a regular display size and powered by batteries, this model from Texas Instruments is a popular choice among students, professionals, and anyone in need of a versatile calculator for their calculations. The TI-89 Titanium has been tested and confirmed to be in working condition, making it a dependable option for everyday use.
eBay