TI-83+/84+ and the TI-83+/84+SE
Go to (2nd) Mem and choose
About. The number listed after ID: will be the calculators
unique Identification Number. Be careful when reading the 8's
and the B's. The 8's are blocky and the B's are more rounded on
the right hand side, as you can see in the Identification number
Be sure to record this Identification
in a secure location.
If your calculator is lost or stolen, you will most likely be asked to
the calculator by this number.