Inside battery area there is a piece of tape holding the backup batteries in place. The cover and screw is there but tape holding it in place. The TI-89 Titanium Graphing Calculator by Texas Instruments is a handheld unit designed for students and professionals in the fields of business, science, and mathematics. With a regular display size and powered by batteries, this graphing calculator offers a range of features including USB connectivity, calculus functions, and programmability. It allows users to solve complex equations, generate graphs, and create custom functions. Made in China, the TI-89 Titanium is a reliable tool for those needing advanced mathematical capabilities in a compact and portable device.
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