Read How the TI-84 Plus Became Americas Most Popular Graph Calculator – A Brief History :
http://www.ti89.com/how-the-ti84-became-the-most-popular-calculator.php
Read How the TI-84 Plus Became Americas Most Popular Graph Calculator – A Brief History :
http://www.ti89.com/how-the-ti84-became-the-most-popular-calculator.php