Ti products according to Ti. The maths classes of the graph calculator students, from school to many universities, even allow a graphing calculator.
Ti84 plus graphing calculator according to Ti. With the ti84 silver edition high resolution, color display, ti84 makes it easy to understand scientific topics.
Series ti83 as reported by Wikipedia. The graphical calculators of the original ti83 texas series have themselves been improved. Released the most popular students calculators.