A Texas Instruments TI-84 Plus CE-T graphing calculator. These calculators are primarily used in educational, scientific, and engineering fields. Its main uses include: Basic and advanced calculations: This calculator goes beyond simple arithmetic to offer advanced functions such as trigonometry, logarithms, exponents, roots, and more. Statistical analysis: Used to perform advanced statistical operations and analyses, including distribution calculations and spreadsheet creation. Graphing: One of the key features is the ability to graph functions and plots, helping students and professionals visualize equations and data. Programming: Supports program storage, allowing users to write custom programs for specific functions. Academic use: It is an essential tool for high school students (especially IG and IB) and university students in science, engineering, and mathematics courses.