What the Plus Symbol Means

TI-83 and TI-83 Plus

If you've ever shopped for a graphing calculator, you've probably seen Texas Instruments' line of them - starting with the TI-83 and going on up to the TI-89 (before the more recent release of the TI-Nspire). But in the middle of that range are a few calculators with a big plus symbol (+) after the number. And you've probably wondered - what does that plus symbol mean? What's the difference between a TI-83 and a [...] Read more »

TI-89

TI-89 Titanium

Until the more recent release of Texas Instruments' TI-Nspire, the TI-89 represented the pinnacle of graphing calculator technology. Its hardware reflected this coveted position, and its calculation capacities were previously unmatched - but like the TI-83 and the TI-84+ before it, it was eventually replaced with an upgrade. The TI-89 came with 256KB of RAM, which was significant for a calculator when it was released in 1998. It also had Flash ROM, like the TI-83+ [...] Read more »