1996 – Texas Instruments announced it would release the TI-83 and became one of the most popular calculators. The TI-83 had many graphing modes including polar, parametric, sequence and function graphs. It could also run statistics, trigonometry and algebraic functions.
The TI-83 was replaced by the 83 Plus in 1999 which added flashable memory for upgrades. This calculator is still available today and you can get the Texas Instruments TI-83 Plus Graphing Calculator on Amazon.
The TI-83 had a Zilog Z80 processor at 6 MHz and 32 kb of RAM. You could use 4 AAA batteries or the power supply to run. Price was $125