Calculators have been developed by Texas Instruments since the 1970s. Texas Instruments' graphing calculators have support for various programming languages, listed here. Because of this support for programming languages software such as emulators have been created for these devices.
The TI-Nspire CX is the most powerful calculator produced by Texas Instruments, and because of this, there are many emulators that run on it. In order to get emulators to run, Ndless must be installed on the device. Note that while many programs for the Nspire CX will also work with the Nspire CM and monochrome models (Touchpad/Clickpad), some will not work on monochrome models due to having less RAM and slower CPU, and grayscale display with terrible response time make things hard to see if programs aren't adapted to it.
Between the TI-84+, the TI-84+ Silver Edition, the TI-84+ C Silver Edition, and the TI-84+ CE, there a few emulators that run on this family of calculators. Most programs for the TI-84+ will also run on the TI-83+ and TI-83+ SE, and they are included here for completeness.