The TI-83 Plus is not in the NCEES 2026 approved calculator families; Texas Instruments approval is limited to TI-30X and TI-36X models.
The FE calculator policy is controlled by NCEES, and the current rule works as a strict whitelist. That means the question is not whether the TI-83 Plus is useful, common, old, non-CAS, or familiar from school. The question is whether the printed model family appears on the approved list. For Texas Instruments, NCEES lists TI-30X and TI-36X models for the 2026 exams. The TI-83 Plus belongs to the TI-83 graphing family, so it does not match either allowed family. This verdict is intentionally conservative because examinees do not get a general graphing-calculator exception at FE check-in. If a calculator is outside the listed family, do not rely on clearing memory, removing programs, disabling apps, or explaining the model to a proctor.