Texas Instruments Ti-55 III vintage 1987 Constant Memory Scientific Calculator

Texas Instruments TI-55 III. Constant Memory Scientific Calculator Date of introduction: 1986, Display technology: LCD. Display size: 8 + 2. Size: 5.8" x 2.8" x 0.85" 147 x 72 x 22 mm3. New batteries just installed. The Texas Instruments TI-55 III is a programmable calculator with 8 digits precision and algebraic logic. It has 45 keys, and an LCD (liquid crystal) display