DESC: The TI-84 Plus calculator offers a built-in USB port, an improved display and preloaded applications designed to maximize student performance in numerous subjects including geometry, statistics, algebra, physics, chemistry, biology and others. Preloaded calculator software applications include topics in Algebra 1 and Vernier EasyData and many others. Offers 480K of FLASH memory, 24K of available RAM memory, internal clock with date and time display, 14 interactive zoom features, and 8-line by 16-character display. Also includes TI Connectivity Cable. Built-in USB port and external cable allow easy, fast data transfers between linked calculations and computers, as well as unit-to-unit file sharing capabilities. Calculator graphs 10 rectangular functions, six parametric expressions, six polar expressions, and three recursively-defined sequences. Powered by four AAA batteries with a Silver Oxide battery backup to protect RAM memory during main battery change.