Texas Instruments TI-89 Graphing Calculator CONDITION -Pre-Owned -Scuffs/Marks from Use -Tested and Works The item has been used previously. The item may have some signs of cosmetic wear, but it is fully operational and functions as intended Over 500 KB memory for storing functions, programs, and data Pretty Print technology displays mathematical expressions as they appear in textbooks High-resolution display with split-screen views Computes symbolic solutions to differential equations Input/output port and cable, also supports optional TI-GRAPH LINK