## The Definitive History of Calculators

From ancient Greece to modern Texas Instruments calculators, we dive into the fun and nerdy history of Calculators!

## History of Calculators: Table of Contents

I. Introduction

II. The Abacus

III. The Slide Rule

IV. The Mechanical Calculator

V. The Electronic Calculator

VI. The Graphing Calculator

VII. The Modern Calculator

VIII. Conclusion

## The Fascinating History of Calculators

### Introduction

Calculators are such an integral part of our daily lives, it's hard to imagine a world without them. But where did these handy devices come from? Join us on a journey through the history of calculators, from ancient times to the present day.

### Ancient Calculators

Calculators have a long and fascinating history that dates back to ancient times. The oldest known calculating device is the abacus, which was used by the ancient Egyptians, Greeks, and Romans. The abacus is a simple frame with beads that can be moved up and down to represent different numbers. By sliding the beads around, people could perform basic math operations like addition and subtraction.

### The Slide Rule

### The First Mechanical Calculators

In the 17th century, the first mechanical calculators were invented. These early machines were large, complex, and expensive, and they could only perform basic arithmetic operations. One of the most famous mechanical calculators was the Pascaline, which was invented by Blaise Pascal in 1642. The Pascaline used a system of gears and wheels to perform calculations, and it could only handle basic addition and subtraction.

### The First Electronic Calculators

In the early 20th century, the first electronic calculators were developed. These early machines used vacuum tubes to perform calculations, and they were much faster and more powerful than mechanical calculators. The first electronic calculator was the Atanasoff-Berry Computer, which was developed in 1937. However, electronic calculators didn't become widely available until the 1970s, when affordable models were introduced.

### The First Handheld Calculators

The first handheld calculators were introduced in the 1970s, and they quickly became popular because of their portability and ease of use. These early calculators were fairly basic, and they could only perform basic math operations like addition, subtraction, multiplication, and division. However, as technology advanced, handheld calculators

## Calculators: The modern era

### Pocket Calculators

### Scientific Calculators

### Graphing Calculators

Here are five popular graphing calculators that are widely used today: