I have EDCed a Texas Instruments TI-36 X Pro (2011 version) either on my person, in my backpack or otherwise very near me since June of 2014. It is my favorite scientific calculator ever made!

For some time now, I had also been EDCing a composition book in my backpack and taking notes on subjects that interest me.

This page of notes pertains to the history of the TI-36 calculator and I will cite my main source as Wikipedia. I took these notes on October 14, 2018.

Without further ado, here are the notes:

These are details of the history and specifications of the TI-36.

The Texas Instruments TI-36 began in 1986 as an upgraded variant of the TI-35 Plus with Solar Cells a ten digit mantissa, two digit exponents, twelve-digit internal precision, base calculations (decimal, hexadecimal, octal and binary), complex values, statistics, the ability to convert the coordinates of polar and rectangular angles, an X-Y exchange, percentages, register-current stack exchange, factorial, permutation/combination, fifteen level parenthesis with six pending operation stacks, two operand registers (A,B) and one memory register.

The 1986 TI-35 Plus uses a Toshiba T7767.

The 1986 TI-36 Solar uses a Toshiba T7768 and features trigonometric functions, exponents, logarithms and intelligent order of operations.

They were upgraded in 1989.

The 1989 TI-35 Plus now uses a Toshiba T-7765 and now has a black shell.

The TI-36 Solar features smaller and more efficient solar cells. The Text, “ANYLITE SOLAR” replaces “SCIENTIFIC” on the bottom right of the face.

They were upgraded again in 1991 as the TI-35X or the TI-36X SOLAR and had a similar design of the TI-68, but lacking programming capability and the tilted screen.

There was also the addition of unit conversions such as: centimeters to inches, liters to US Gallons, kilograms to pounds, Celsius to Fahrenheit and grams to ounces, eight physical constants, a three-count register and two variable statistics with linear regression.

Base calculations now include Boolean logic (NOT, AND, OR, XOR, XNOR.)

Other new features included cube roots, fraction mode display and conversion of pure and mixed numbers.

The complex function was removed.

They have fifteen parenthesis stack level.

The 1991 TI-35X uses a Toshiba T6A58S and the 1991 TI-36 X Solar use a Toshiba T6A57.

They were mostly cosmetic upgrades in 1993, featuring redesigns of rubber like keys and a rounder case.

In 1996, the TI-36X Solar was upgraded with recolored labels, solid plastic keys. A bare processor was now attached to the motherboard.

The TI-35 was also discontinued.

In 1999 two variants of the TI-36 were released to the markets:

The TI-36 eco RS featuring a cabinet that was made from recycled plastics.

The TI-36 XII featured a two-line display, 11 5X7 cell characters, could store multiple expressions each holding eighty-eight characters, thirteen digit internal precision, five registers for memory, two registers for expressions, integer division, new unit conversions (meters to feet, meters to yards, kilometers to miles, litres-to UK Gallons and kilometers per hour to meters per second), eight more physical constants in addition to a Pi constant, two variable statistic regression models include natural logarithms, exponent, power, forty-two sample points or pairs can be stored, the binary base calculation was removed, the complex function was restored, supports conjugate, real/imaginary numbers, absolute value, integral calculation, random number generators, stacks were increased to twenty-three pending operations, eight pending values, a D-pad and a restyled cabinet.

2004 brought on another two upgrades:

The TI-36X SOLAR, which was a total cosmetic redesign on the 1996 model design. This new theme was based on the 2004 BA II Plus or the 2003 TI-1706SV.

There was also a slight redesign on the 1999 TI-36 XII, mostly different colored keys.

These were manufactured by Nam Tai Electronics.

In 2005, a talking version of the TI-36 known as the Orion was made to help the visually impaired.

2011 brought about the latest incarnation, the TI-36 X Pro.

Expression lengths were reduced to eight characters. Registers were increased to eight for memory, one for formula and can store three list formulas. Physical constants were increased by four to twenty, conversion sets increased to forty. Binary base calculations were restored.

A plethora of new functions were added:
Least common multiple, greatest common denominator, prime factors summation, product rounded value, integer part of a number, fractional part of a number, greatest integer smaller or equal to the number, minimum and maximum of the two numbers, Modulo calculus numeric derivative symmetric difference quotient method, two variable statistics, quadratic and cubic regressions, distribution functions, normal probability density function, mean=0 and sigma=1, function of x, probability between x boundaries, inverse cumulative normal distribution functions for a given area under the normal distribution curve with a user-specified mean and standard deviation, probability at x for the discrete binomial distribution with user-specified mean and standard deviation, probability at x for the discrete binomial distribution with user-specified trial number and probability of success per trial, cumulative probability at x for binomial distribution with specified trial number of success per trial, probability at y and y for Poisson distribution with the specified mean, statistics results min/max of x values 25/75 percentile, function table formula based generator, manual table Matrix three editable tables, preset 2X2 and 3X3 identity matrices, matrix arithmetic vector three editable tables, preset last matrix/vector result, vector arithmetic, dot product, cross product, polynomial solver 2nd/3rd degree solver, linear equation solver 2X2 and 3X3 solver, Base-N operations, Boolean operators, expression evaluation, complex numbers, polar coordinate entry, polar cartesian display mode angle for complex number.

In 2017 and continuing, the TI-36 X Pro is now made in The Philipines.

The TI-35 and TI-36 lines are the highest end models of Texas Instruments scientific calculators.

TI-36 Calculator History Table:
YEAR……..Model………Processor……..Country of Manufacture
1986……..TI-35 PLUS….Toshiba T7767….Italy
1986……..TI-36 SOLAR…Toshiba T7768….Taiwan ROC
1991……..”” “”………Toshiba T6A57….Italy
1996……..TI-36 X SOLAR.??……………Mainland China
1999……..TI-36 eco RS..??……………”” “”
1999……..TI-36 X II……??……………”” “”
2004……..”” “”………??……………”” “”
2004……..TI-36 X SOLAR.??……………”” “”
2011……..TI-36 X Pro…??……………Mainland China
2017……..”” “”………??……………The Philipines