Who invented the first calculator?

1. Decimal counting method invented by China in the Eastern Han Dynasty; Abacus was invented in the Song Dynasty.

2. 16 17, Scottish inventor John Napier used bone tools for division, subtraction, addition and multiplication, and invented the slide rule.

3. 1622 William Autre invented the sliding slide rule.

4. With the active participation of Kepler, Shekel finally started to develop the first calculator with four functions of addition, subtraction, multiplication and division (computational clock) in 1624 at Heidelberg University. Unfortunately, the prototype model was destroyed by fire during the construction.

5. 1642, Pascal (1623- 1662, French mathematician) invented the manual calculation machine.

6. 1673, Leibnitz (G.W.Leibnitz, 1646- 1765438, a great German mathematician) built a mechanical computing machine that can perform four kinds of operations, which caused a sensation throughout Europe. His machine used shift addition in multiplication, which later evolved into binary and was also adopted by modern electronic computers.

7. 1822 British mathematician Charles Babbage (1791-1871) designed a differential expansion model, which can perform arithmetic operations. It has a six-digit calculation ability, and more importantly, it can calculate any function of the second degree.

8. 1854, George Schutz, who studied mechanical engineering, and his son Edward built the world's first fully operable differential extender.

American engineer herman hollerith (1860- 1929) made the first electronic computer. 1890, he used electromagnetic relay instead of some mechanical components to control punched cards, which was the first electromechanical automatic computer for human beings.

10. 1937, Konrad Zuse (19 10- 1995) built the Z- 1 electromechanical computer. 1941115 and Z-3 were successfully developed. It is an electromechanical computer completely controlled by programs, all using relays, and all materials cost 25,000 marks (at that time, it was 6,500 dollars).

1 1. From April 1939 to October 8 1940. This integer calculator is like an advanced desktop calculator.

12.1944 in may, Howard aken, a professor of applied mathematics at Harvard university in the United States, built the "Harvard IBM automatic sequence control computer", which was later called "Mark 1", and its components were relays.

13. 1942, a machine model designed by Vincent artner, a professor of mathematics at Iowa State College, and his student Bailey was born. It has 300 electron tubes, which can be added and subtracted, and uses drum capacitors to store 300 numbers. This is the first digital computer with regenerative storage function with electronic tubes as components in history. Later, the model they designed was named after them, called "artner Sof-Berry Computer", or ABC for short. ABC on the threshold of the digital age is indeed symbolic.

The birth of the first electronic computer;

On February 1946 and 10, the Department of Military Machinery of the US Army and Moore College jointly held a press conference to announce the successful development of the first electronic computer "Eniac". It has five functions: 1, 5000 addition operations per second; 2, 50 times per second multiplication operation; 3. Square sum cubic calculation; 4. Numerical operation of sine and cosine functions; 5. Other more complicated calculations. On February 5, 2005, a grand celebration was held in the Houston Auditorium of the school. Dr. F. Juwett, President of the National Academy of Sciences, announced "Eniac". Then we went to Moore College to visit the magical "electronic head". The "Eniac" that appears in front of people is not a machine, but a room full of machines, with many switch buttons, all kinds of wires wrapped around the east and west, and flashing indicator lights. People seem to come to a control room, which is "Eniac". This huge thing is 8 feet high, 3 feet wide and 100 foot long. Equipped with 18000 vacuum tube, 1500 electromagnetic relay, 70000 resistor, 18000 resistor, 18000 resistor. At first, the military's investment budget was $6.5438+$5,000, but in fact, the total cost was $486,000, and the contract was revised more than 20 times.

At the end of 1946, "Enyak" was packed and transported to the ballistic laboratory of Aberdeen Ordnance Test Site. It began its computing career. In addition to the conventional ballistic calculation, it later involved many fields, such as weather forecast, nuclear energy, cosmic knot, hot fire, wind tunnel test design and so on. The most interesting thing is that 1949, after 70 hours' operation, can accurately calculate pi to 2037 digits after the decimal point, which is the most careful value calculated by human beings for the first time with their own creation.

195510 On February 2nd, "Enyak" completed his meritorious service and officially retired. Since 1945 was officially built, the first human "electronic brain" has actually been running for 80223 hours. In the past ten years, its arithmetic operations have exceeded the sum of all the operations in the history of the human brain.

Finally, when you say calculator, you may mean "calculator" that you put in your pocket. It was first developed by MITS Company founded by Roberts and his colleagues in 197 1. Answer over!