The -85 was released in 1992, iirc it's TI's second graphing calculator. The -83 is a later model.
I was told that one of the designers graduated high-school in '81 and college in '85, so the HS calculator was an 81 and the college calculator was an 85.
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I was told that one of the designers graduated high-school in '81 and college in '85, so the HS calculator was an 81 and the college calculator was an 85.