Texas Instruments Texas Instruments TI-89 Graphing Calculator CAS VTG 90s School Engineer Working

Texas Instruments TI-89 Graphing Calculator – Tested Working Pre-Owned This is a classic Texas Instruments TI-89 advanced graphing calculator with CAS in a handheld battery-powered format. Ideal for calculus, engineering, and higher-level math coursework or as a nostalgic 1990s/2000s tech collectible. - Model: Texas Instruments TI-89 advanced graphing calculator (original 1998 series) - Features powerful Computer Algebra System (CAS) for symbolic math and equation solving - Supports 2D graphing, parametric, polar, sequences, and 3D-style function visualization - 160 x 100 pixel LCD display with multi-line text and graphing capability - Battery powered handheld design with protective slide cover included (if shown) - Great for students, engineers, and collectors of vintage Texas Instruments calculators Keywords: vintage graphing calculator, TI 89 CAS, engineering math tool, calculus calculator, 90s school calculator, retro tech collectible