It is programmable to hold up to 32 key-codes that allow the user to repeat simple calculations with different values.

[2] The TI-55 II (with an LCD display) was introduced in 1981, but, like many other Texas Instruments calculators of this time, suffered from serious keyboard reliability problems.

It features redesigned keyboard mechanics, thereby eliminating the common "bouncing keys" fault of prior models.

Date of introduction: May 21, 1976 Display technology: LED 10 + 2 Size: 5.8" x 3.:;2" x 1.3" 147 x 81 x 32 mm.

Weight: 8.5 ounces, 240 grams Jmm Manufacturer: Texas Instruments