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Modifications: cropped, removed background, perspective corrected to rectangular with freeware IrfanView, Plug-in "Perspective Transformations", more gamma value, display contrast enhanced. The original can be viewed here: HP-38G scientific graphing calculator (edited, without background).JPG: . Modifications made by Pittigrilli.
removed blue background, less color saturation, adjusted exposure, black level, contrast: 16:38, 18 March 2024: 1,846 × 2,926 (3.23 MB) Pittigrilli: File:HP-65.jpg cropped 10 % horizontally, 10 % vertically using CropTool with lossless mode.
No higher resolution available. Scientific_Calculator,_TI-30XIIS,_removed_background,_shadow.jpg (360 × 576 pixels, file size: 76 KB, MIME type: image/jpeg ) This is a file from the Wikimedia Commons .
The Texas Instruments TI-30 retailed for $24.95 (about $130 today) and operated on a 9-volt battery. It had a red, eight-digit display and offered such functions as percents, constants, roots ...
In the mid-1970s the first calculators appeared with field-effect, twisted nematic (TN) LCDs with dark numerals against a grey background, though the early ones often had a yellow filter over them to cut out damaging ultraviolet rays. The advantage of LCDs is that they are passive light modulators reflecting light, which require much less power ...
Texas Instruments TI-84 Plus, the most successful graphing calculator in terms of sales. A graphing calculator (also graphics calculator or graphic display calculator) is a handheld computer that is capable of plotting graphs, solving simultaneous equations, and performing other tasks with variables.
Qalculate! supports common mathematical functions and operations, multiple bases, autocompletion, complex numbers, infinite numbers, arrays and matrices, variables, mathematical and physical constants, user-defined functions, symbolic derivation and integration, solving of equations involving unknowns, uncertainty propagation using interval arithmetic, plotting using Gnuplot, unit and currency ...
Casio fx-77, a solar-powered digital calculator from the 1980s using a single-line LCD. A scientific calculator is an electronic calculator, either desktop or handheld, designed to perform calculations using basic (addition, subtraction, multiplication, division) and advanced (trigonometric, hyperbolic, etc.) mathematical operations and functions.