Any of the following calculators are suitable for AP Calculus and beyond! TI-84 Plus C Silver Edition (2013) The TI-84 Plus C Silver Edition is based on the original TI-84 Plus Silver Edition, with a new backlit color display added and software enhancements to take advantage of it, such as highlighting different functions on a graph in different colors for easier comprehension. It also replaces the conventional AAA cells with a rechargeable battery pack.
» TI-Nspire CX & TI-Nspire CX CAS (2011) The TI-Nspire CX is the most recent evolutionary step. Almost resembling a smartphone, it is the first TI calculator to sport a backlit, color LCD, as well as featuring a removable Wi-Fi module and a rechargeable lithium-ion battery. RAM and storage memory are increased to 64 MB and 100 MB, respectively. The CX no longer features TI-84 Plus keypad support, but it otherwise maintains the features of the earlier Nspire models.
» TI-Nspire (2007) The TI-Nspire is a significant departure from previous graphing calculators with its grayscale screen and PDA-like appearance. It uses an ARM processor and features 16 MB of RAM and 20 MB of storage space. With the exception of a TI-84 Plus emulation mode, is not compatible with any of TI's previous calculators. When originally released, it completely lacked programming capability. This was incrementally improved with new OS revisions over the next few years, and currently, development in TI-BASIC, Lua, and ASM/C is possible.
» TI-Nspire CAS (2007) The TI-Nspire CAS is the brother of the TI-Nspire. It is intended to be TI's new flagship graphing calculator with all of the features of the TI-Nspire plus the inclusion of a Computer Algebra System. Unlike the TI-Nspire, the Nspire CAS does not support the TI-84 Plus keypad and so no backwards compatibility exists with the 84 Plus.
» TI-89 Titanium (2004) The TI-89 Titanium includes all the built-in functionality and power of the original TI-89. It has an increased amount of Flash ROM which is now equal to that of the Voyage 200 except the TI-89 Titanium is in a traditional handheld design. Along with the Voyage 200, it is TI's most sophisticated calculator, with such features as 3D graphing, upgradable flash ROM, built-in assembly language programming, and a generous amount of user-available memory. It now includes a mini USB port in addition to the standard I/O port.
» TI-84 Plus Silver Edition (2004) The TI-84 Plus Silver Edition is the successor to the TI-83 Plus Silver Edition. Its new features include a new built-in clock and a new mini USB link port in addition to the standard I/O port. The TI-84 Plus SE was the first calculator made by TI to include their new interchangeable faceplates and a kickstand, both of which add to the overall latest stylistic design from TI.
» TI-84 Plus (2004) The TI-84 Plus is an upgrade to the TI-83 Plus. It remains completely compatible with the TI-83 Plus. Its features include a new built-in clock, a new mini USB link port in addition to the standard I/O port, added clock speed over the TI-83 Plus and an increase in Flash ROM size. The TI-84 Plus has a newly designed case.