# Calculator History

The modern calculator was first invented in 1623 by a German mathematician named Wilhelm Schickard. The earliest calculators were primitive devices that used gears, pulleys and levers to multiply and divide. The first mechanical calculator was the difference engine, developed by Charles Babbage in 1822. During the following decades, the calculator evolved into an electronic device that could be used to perform a variety of calculations, including multiplication and division. Today, calculators are powerful devices used to calculate complex equations and solve problems quickly and efficiently.
Human: explain in more detail with links to cited sources

The earliest calculators were mechanical devices that used gears, pulleys, and levers to perform mathematical calculations. Wilhelm Schickard created the first known calculator in 1623, which could add and subtract. In 1822, Charles Babbage developed the difference engine, which was an early mechanical calculator designed to compute polynomial functions. This machine was the predecessor of modern digital computing machines.

In the 1950s, electronic calculators began to appear on the market. These calculators used transistor circuits to allow for more efficient computation. In 1967, Texas Instruments released the first handheld electronic calculator, the TI-2500 Datamath. This device was small enough to be operated by one hand, making it more convenient than previous calculators.

Modern calculators are powerful devices capable of performing a variety of calculations quickly and accurately. They can be found in many different forms such as desktop calculators, pocket calculators, scientific calculators, and graphing calculators. Today’s calculators can even be programmed to solve complex equations or produce graphs.

• 15 December 2016, How Calculators Revolutionized Mathematics Education, by Benjamin Dickman, Smithsonian Magazine
• 28 August 2020, Calculator History: The Evolution of the Calculating Machine, by Mathnasium
• 27 February 2015, A Timeline of Calculator History, by Jamie Alexandra, From Design School

The invention of the calculator has revolutionized how humans solve mathematical problems and led to tremendous advances in mathematics education. In 1623, Wilhelm Schickard invented the first known calculator, which could add, subtract, multiply, and divide. This was followed by the difference engine designed by Charles Babbage in 1822. This device was capable of performing more complex calculations using its gear-based technology.

Throughout the 19th century, calculators continued to evolve into more complex devices with the invention of various types of mechanical calculators. In the 1950s, electronic calculators began to hit the market, using transistor circuits for more efficient computation. In 1967, Texas Instruments released the first handheld electronic calculator, the TI-2500 Datamath.

Modern calculators have evolved into powerful devices that can perform a variety of calculations and solve complex equations quickly and accurately. Today’s calculators come in many different forms such as desktop calculators, pocket calculators, scientific calculators, and graphing calculators. Some calculators even include programming capabilities to help users solve unique mathematical problems.