What were the first pocket calculators?

There are many technologies that we now simply take for granted, and the pocket calculator is no different. It is one of the modern conveniences we use all the time, and we just don't even think about it, whether we count the twenty percent tip in the local restaurant or buy with the calculator of our mobile phone. Before the first calculators, the pockets were much larger and slower to perform mathematical calculations. Things have certainly passed a long way from the invention of the first pocket calculators. ABACUS is used across a wide range of ancient cultures and is still used in different parts of the world, a simple computer device made of beads or stones that slide along wires or grooves. This device has been used before accepting a modern numeric system and is still used in many cultures.

The first years of scientific, mathematical and technological progress have finally been invented by the first machines that could make simple mathematics.There were many different machines that worked in different ways, but they all lacked common features - portability. For example, mechanical calculators used hand handles and could weigh twenty or thirty pounds. IBM introduced the first commercial electronic calculator All-Transistor in 1954. It was located in several large cabinets and could be your at a low price of about $ 80,000 (USD).

In the end, the first pocket calculators began to appear at the end of the sixties and early 70 years. Texas instruments introduced the first of many in 1967, which weighed for less than three pounds. Rather than using the LCD screen, the results of its calculations - multiplication, subtraction and division - were printed on a paper tape. The user could enter the threshing of numbers and the printed results were as large as twelve. Another of the first pocket calculators was designed by the Sharp brand and introduced in 1971. This used the fluorescent display and DThe orbiting battery and weighed about one pound. It was still not something you could in your pocket with great ease, but marked a significant decrease in size and use of energy compared to some other calculators the first pockets.

Further technological progress at this time led to the first calculations of pockets that used integrated circuits. The first was introduced in Japan and also became the first to use the LED display and replaceable batteries. The use of "chips" of the integrated circuit has again significantly reduced the size of the calculator. In 1972, some of the first calculators that were introduced were only 2.5 ounces and were less than a third of the inch. In the end, these calculators were Avalikost, which could really fit into someone's pocket. Further progress allowed pocket calculators to become affordable for almost all over the next few years.