"When’s the last time you saw any consumer electronics product — much less a cutting-edge one — go two-and-a-half years without a significant hardware refresh?"<p>The TI-83 Plus and TI-84 Plus calculators. See for example <a href="http://www.theatlantic.com/technology/archive/2011/08/what-your-old-graphing-calculator-says-about-technology/244028/" rel="nofollow">http://www.theatlantic.com/technology/archive/2011/08/what-y...</a> .