The first graphing calculator made by Texas Instruments.

Topics Covered

Current Usage

Differences in Programming

Related Pages


TI-84+/TI-84+ SE




Programming Main Page

Current Usage

The 81 has fallen out of common usage (designed in 1991).  It is underpowered, although it is powered by the Z80 microprocessor.  This is the same processor used in the 8x series calculator, with the exception of the 89.  The 81 only runs at 2mHz, while the other ones run at 6-15 mHz.

Differences in Programming

The 81 has a much more limited amount of programming functions available.  The most notable of the differences is the lack of a menu or ouput function.  Otherwise, the programming notation is essentially identical to the other calculators.