Excluding the abacus or slide rule, the first mechanical calculator was invented by French inventor, Blaise Pascal in 1642. It could add or subtract two numbers or divide and multiply by repetition, using geared wheels.Know More
In 1820, a device in a patent filed in France by Thomas de Colmar, became the first commercially viable counting machine. The design was copied by around 20 companies across Europe. In 1877, the Grant Mechanical Calculating Machine was born and in 1886, the P100 Burroughs Adding Machine arrived. It was not until 1948 that a pocket-sized calculator was invented and came in the form of the Curta calculator.
It was not until the 1960s and the advent of electronic devices that the electronic calculator came to be. ANITA (A New Inspiration To Arithmetic/Accounting) was the first all-electric desktop calculator and was released in 1961. They sold for about $1,000 when they were released that, in 2014, is nearly $8,000 after accounting for inflation. In 1965, the ELKA 22 was produced in Bulgaria and was the first calculator in the world to have a square root function. The end of bulky calculators did not happen until 1968 when Texas Instruments released the Cal Tech, the first hand-sized calculator that printed the results to paper.Learn more about Inventions
Anaximander, a Greek philosopher who lived in Miletus in the 6th century, is credited with the invention of the first map. The earliest known maps are related to the sky, and date back to 16,500 B.C.Full Answer >
The first radio was initially called the "wireless telegraphy," and a complete functional model was built by Guglilmo Marconi in 1895. Several other inventors laid the groundwork for the invention including Heinrich Rudolf Hertz, Nikola Tesla, Amos Dolbear, Reginald Fessenden and William Crookes.Full Answer >
It is unclear when the first skipping rope was invented, but there is evidence of activity of playing with a jump rope originated in China and also in Egypt in 1600 AD. Many painters during medieval Europe depict children jumping ropes on cobbled streets.Full Answer >
The first voltmeter, called a galvanometer, was invented by Andre-Marie Ampere in 1824. It was the first instrument used to measure the electrical current in a conductor.Full Answer >