Texas Instruments TI-84 Plus Silver Edition Graphing Calculator - BLUE TI-84 Plus Silver Edition-Blue. Graphing-Pre-Algebra, Algebra 1&2, Geometry, Trigonometry, Statistics, Pre-Calculus. Can also be used for Biology, Chemistry, Physics, Business and Finance. Display size 64x96, Memory ROM/RAM 1.5MB/24K. Includes a protective slide case, complete manual on CD, Backup and 4 AAA batteries.