Texas Instruments has been the market-leading graphing calculator for more than 15 years. Since the release of its TI-81.1 graphing calculator, the TI's popularity has grown.
They have upgraded the initial TI-81.1 into the TI-82 T-83, TI-83, TI-83, and TI-83. TI-83.5 plus and then they have added the TI-84.1 plus.
It is the TI-84 Plus is still very like the TI-81. While it's a popular model, however, the TI-84 is a dated model. The company behind HTML realized they had the right time to transition to a different platform with flash programmers for Texas Instruments.
In 2007 Texas Instruments released their Nspire calculator. The new features were different from the previous line. The menus of the old T-84 were confusing and, at the very least, bizarre.
For the novice, it was difficult to figure out which button to press and the menu would take up a large portion of the screen. Drop-down menus are the norm in the Nspire. Students can make use of this same display as a PC to open an option.
Additional features are the highest screen resolution for calculators, the ability to save spreadsheet models, documents as well as math print for nearly the entire mathematical family. The Nspire also comes with a significantly enhanced graphing system which makes it easier to use the old 84's interface.
The TI-Nspire was a complete redesign from the TI-84. There was just one market reaction. Why? TI was not prepared for the reactions of both groups. In the beginning, although there were positive reviews about the Nspire, teachers initially were hesitant to adopt the Nspire. Many had been too busy using the older TI-84.