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2. TI-108 - Wikipedia

   en.wikipedia.org/wiki/TI-108

   The TI-108 is a basic handheld calculator manufactured by Texas Instruments aimed at introducing younger students to basic arithmetic and calculator functionality. [1] The TI-108 is widely used among younger students due to its low cost, durability, and simplicity.

3. Scientific calculator - Wikipedia

   en.wikipedia.org/wiki/Scientific_calculator

   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.

4. HP-35 - Wikipedia

   en.wikipedia.org/wiki/HP-35

   The calculator had a four-register stack (x, y, z and t). The stack was represented in the operating manuals with the t register at the top, followed by the registers z, y, and x. The "enter" key pushed the displayed value (x) up the stack. Any binary operation popped the bottom two registers and pushed the result.

5. These Calculators Make Quick Work of Standard Math ... - AOL

   www.aol.com/best-calculators-students...

   It doesn’t have the computing power of other models on the list, but the Canon LS-82Z is a dependable basic calculator. Shop Now. LS-82Z Handheld Calculator. amazon.com. $7.99.

6. Curta - Wikipedia

   en.wikipedia.org/wiki/Curta

   A partially disassembled Curta calculator, showing the digit slides and the stepped drum behind them Curta Type I calculator, top view Curta Type I calculator, bottom view. The Curta is a hand-held mechanical calculator designed by Curt Herzstark. [1] It is known for its extremely compact design: a small cylinder that fits in the palm of the hand.

7. Calculator - Wikipedia

   en.wikipedia.org/wiki/Calculator

   Made in Japan, this was also the first calculator to use an LED display, the first hand-held calculator to use a single integrated circuit (then proclaimed as a "calculator on a chip"), the Mostek MK6010, and the first electronic calculator to run off replaceable batteries. Using four AA-size cells the LE-120A measures 4.9 by 2.8 by 0.9 inches ...