>From the looks of it the I-nnnn is the mo/yr it >was made, not sure though, just a guess. hope this helps. >-Jim Pingle- (Tajador on IRC) You would be correct. I have a TI-85 v10.0 dated 4/96(I-0496) and a TI-92 v1.4(I-1295). Both versions are consistant with their release dates. Nathaniel Gibson ngibson@postoffice.ptd.net