Terminated: 1998
Apparently, due to it having a QWERTY keyboard, it was considered a computer instead of a calculator and therefore banned on standardised tests.
It is quite a big device (20 x 12 cm),, weights 600 grams and has a special dent to hold it steadily using one’s left hand. Its vase is shaped in such a way as to make holding it comfortable.
It is also quite capable, with 68 kB of RAM, the 10 MHz Motorola MC68000 CPU, and a dot-matrix LCD of 240 x 128 pixels.
Next to its CAS, it has all anyone could ever wish for. Programming obviously, graphics, even a interactive method to construct geometrical forms and drawings, statistics, unit conversions, all kinds of mathematical operations. Its internal accuracy is also impressive: 14-digits during calculations (but rounded to 12-digits for results) plus a 3-digit exponent for floating point numbers, 614 digits for integer values!
Its back can easily slide off with a slider locking mechanism to replace batteries.
Note the three ENTER keys, function wise identital but placed so they can conveniently be use after entering text, numbers or whilst navigating the menu system.
The LCD of the specimen I was able to obtain is quite vague and the calculator
therefore needs quite a lot of
light to operate with. It does not have dead pixels. Playing with the LCD’
constrast (shifted function of + and −)
does not help much.
Seen here are its menu system which can be summoned using the function keys and navigate using the round cursor key. Also visible is a CAS example showing the integral of the squared sine of X.
A lot of useful information can be found on this Wikipedia page (link validated 2026-10-19).
- The TI-92 (this one) (1995)
- The TI-92 II (1996)
- The TI-92 Plus (1998)
- The TI-89 (1998)
- The TI Voyage 200 (2002)
- The TI-89 Titanium (2004)