Ti's graphing calculator technology is ancient -- older models, like the Ti-83 and 84 can't draw certain lines accurately, thanks to screen resolution limitations -- but they get the job done.

You can leave the TI graphing calculator at home thanks to this web-based TI-83 and TI-84 emulator. As with pretty much all emulators, this depends on a ROM image from the actual hardware to work.

Texas Instruments released the graphing calculator in 2004, and continues to sell it today. The base model still has 480 kilobytes of ROM and 24 kilobytes of RAM.

For the same reason there obviously is a way to do ray tracing of 3D scenes on a modern-day TI-84 Plus CE graphical calculator.

The graphing calculator reached a kind of technological plateau in the late 1990s. At least that's what Amazon consumers are saying. Right behind the TI-83 Plus is the TI-84 Plus, released in 2004.

Seriously TI -- it's 2012. The TI-83 Plus has a 96 x 64 resolution LCD. Are you kidding me? You're selling a "graphing" calculator in the year 2012 with about as many pixels as I have fingers?