Texas Instruments TI-83 Plus Graphing Calculator Lot of 20 TI-83 for parts only

The TI-83 (more commonly referred to as the TI-83 Plus in modern contexts, as it's the widely available and still-supported version) is a classic graphing calculator manufactured by Texas Instruments.

It's an easy-to-use graphing calculator designed primarily for math and science education, allowing students to graph and compare functions, perform data plotting and analysis, and handle a wide range of calculations.

Key Features and Description (from Texas Instruments official sources):

• Graphing Capabilities: Supports function graphing, polar/parametric/sequence modes, and lets users graph and compare multiple functions simultaneously.
• Data Analysis: Enables data plotting, statistical analysis, and more.
• Memory: 24 KB of available RAM and 160 KB FLASH ROM memory for data archive and storage of apps (allowing OS updates and addition of software applications).
• Preloaded Apps: Includes StudyCards™, Vernier EasyData™, Science Tools, Probability Simulation, and others.
• Display: Large 8-line by 16-character LCD screen (64 x 96 pixels) with high contrast for viewing entries, results, graphs, and tables at the same time; supports split-screen modes.
• Compatibility: Fully compatible with TI-84 Plus and TI-84 Plus Silver Edition models for data transfer.
• Power: Runs on 4 AAA batteries with a backup battery.
• Approved for Exams: Permitted on major standardized tests like SAT, ACT, PSAT/NMSQT, AP, and International Baccalaureate exams.
• Other Functionality: Handles advanced math including trigonometry, logarithms, matrices, complex numbers, programming (in TI-BASIC), and more.