TI-36

Series of scientific calculators by Texas Instruments
Texas Instruments TI 36 is a series of scientific calculators distributed by Texas Instruments. It currently represents the high end model for the TI 30 product lines. The TI 36 model designation began in 1986 as variant of TI 35 PLUS with solar cells.

It can display 10 digits mantissa with 2 digits exponent, and calculates with 12 digit precision internally. TI 36 SOLAR was based on 1985 version of TI 35 PLUS, but incorporates solar cells. It addition to standard features such as trigonometric functions, exponents, logarithm, and intelligent order of operations found in TI 30 and TI 34 series of calculators, it also include base (decimal, hexadecimal, octal, binary) calculations, complex values, statistics. Conversions include polar rectangular coordinates (P←→R), angles. Other features include x y exchange, percentage, register current stack exchange, factorial, permutation/combination. Maximum open parenthesis level is 15, with 6 pending operation stacks. There are 2 operand registers (a, b) and 1 memory register. TI 35 PLUS uses Toshiba T7767 processor, while TI 36 SOLAR uses Toshiba T7768 processor. It was manufactured by Taiwanese company Inventec Corporation.

TI 35 PLUS now uses Toshiba T7767S. Cosmetic changes include black shell. TI 36 SOLAR features smaller, more efficient solar cells, and cosmetic changes. The text "ANYLITE SOLAR" replaces "SCIENTIFIC" on the bottom right of the face.

The design was similar on the 1991 version of TI 68, but without programming features and tilt screen, and only uses 7 segment LCD display. The double shift keys are remained. Base calculations were updated to include logic operations (NOT, AND, OR, XOR, XNOR). Additional unit conversions include cm in, litre US gallon, kg lb, Celsius Fahrenheit, gram ounce. There are 8 physical constants. Register count was increased to 3. New statistic modes include 2 variable statistics with linear regression. Other new features include cubic root, fraction mode display and conversion (pure/mixed). Complex function was removed. Stack levels are 15 open parentheses. TI 35X uses Toshiba T6A58S, and TI 36X SOLAR uses Toshiba T6A57 processor.

It received cosmetic redesigns, which include rubber like keys and rounder case.

It received cosmetic redesigns, which include recolored keys and labels, rounder case, solid plastic button. The bare processor is now attached directly on motherboard. TI 35 was since then discontinued.

The design is based on 1996 version of TI 36X Solar, but was marketed to use recycled plastics for housing.

It was a cosmetic redesign for 1996 model, with design theme found in 2004 BA II PLUS Professional financial calculator and 2003 TI 1706SV arithmetic calculator.

A prominent new feature is 2 line display, which includes a row of 11 character, 5x7 cell characters, used to display expressions entered by user. To complement the 2 line display, it also stores multiple expressions. The interface was streamlined to use shift menus to access most scientific functions. An expression can have up to 88 characters or items. Internal precision was increased to 13 digits, while registers were increased to 5 for memory and 2 for expressions (up to 47 characters or items). New arithmetic features include integer division. New unit conversions (meter foot, meter yard, kilometer mile, liter UK gallon, kilometer per hour meter per second), and 8 more physical constants were added (total 16 constants, 10 conversion pairs). Pi constant was also added. New 2 variable statistic regression models include natural logarithm, exponent, power. Up to 42 sample points or pairs can be stored. In base calculation, binary base was removed. Complex function was restored. Supported functions include conjugate, real/imaginary component, absolute value. Other new functions include integral calculation (Simpson's Rule, max 99 intervals), random number generators (0 1 real, integer). Stacks were increased to 23 pending operations, 8 pending values. Cosmetic changes include a D pad and a restyled case.

It was a cosmetic redesign of the 1999 model. Changes include new coloured keys and screen frame. It was manufactured by Nam Tai Electronics.

The TI 36X series is one of the few calculators currently permitted for use on the Fundamentals of Engineering exam. While TI offers other calculators eligible for use on the exam, the TI 36X Pro is the most feature full Texas Instruments calculator permitted. HP and Casio also make calculators permitted on the exam.