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Definition
A computer is a programmable electronic device designed to admit data, perform approved mathematical and reasonable operations at broadband, and screen the results of the functions, all under the control of software. Mainframes, desktop and laptops, tablets and smartphones are a few of the various types of computers. An electric machine which assists with solving problems efficiently. It solves problems relating to instructions given to it by the computer user called programs or software. It is an electronic machine(that uses binary digits) used in all field

Automation
Most humans have a problem with math. Showing this, try doing 584 x 3,220 in your head. It is hard to keep in mind all the steps! People made tools to help them remember where they were in a math problem. The other problem folks have is that they have to do the same problem over and over and once more. A cashier had to make change every day in her head or with a piece of paper. That got a lot of time and made faults. So, people made calculators that do those same things again and again. This part of computer history is named the "history of robotic calculation," which is a fancy term for "the annals of machines that make it possible for me to do this same maths problem over and over without making mistakes."The abacus, the slip rule, the astrolabe and the Antikythera mechanism (which times from about 150-100 BC) are types of automated calculation machines.

Programming
People do not want a machine that could do a similar thing again and again. For instance, a music container is a machine that performs the same music again and again. Some people wanted to be able to inform their machine to do different things. For instance, they wanted to inform the music container to try out different music every time. They wanted to have the ability to program the music pack- to order the music package to experiment with different music. This part of computer history is named the "history of programmable machines" which is a fancy saying for "The history of machines that I could order to do various things if I know how to speak their language."One of the first examples of this was built by Hero of Alexandria (c. 10-70 Advertisement). He built a mechanised theatre which performed a play prolonged ten minutes and was operated by a complicated system of ropes and drums. These ropes and drums were the words of the machine- they informed what the device did and when. Some people dispute that this is the first programmable machine.Historians disagree which early on machines are "personal computers". Many say the "castle clock", an astronomical clock developed by Al-Jazari in 1206, is the first known programmable analog computer. The space of night and day could be adjusted every day in order to take into account the changing lengths of night and day throughout the year. Some count this daily modification as education.Others say the first computer was made by Charles Babbage. Ada Lovelace is known as to be the first programmer.

The Computing Era
By the end of the center Age range, people in European countries thought mathematics and engineering were more important. In 1623, Wilhelm Schickard made a mechanical calculator. Other Europeans made more calculators after him. These were not modern personal computers because they could only add, subtract, and multiply- you cannot change what they have to make them take action like play Tetris. As a result of this, we say these were not programmable. Now technicians use computers to design and plan.In 1801, Joseph Marie Jacquard used punched newspaper cards to inform his textile loom what kind of routine to weave. He could use punch cards in order to the loom how to proceed, and he could change the punch credit cards, this means he could program the loom to weave the structure he wanted. This implies the loom was programmable.Charles Babbage wanted to make an identical machine that may assess. He called it "The Analytical Engine".[8] Because Babbage did not can pay for and always transformed his design when he had an improved idea, he never built his Analytical Engine unit.As time went on, personal computers were used more. People get tired easily doing the same thing again and again. Imagine spending your life writng down things on index cards, holding them, and then needing to go find them again. The U.S. Census Bureau in 1890 possessed hundreds of men and women doing that. It had been expensive, and studies took a long time. Then an engineer exercised how to make machines do a lot of the task. Herman Hollerith invented a tabulating machine that would automatically add up information that the Census bureau collected. The Processing Tabulating Recording Firm (which later became IBM) made his machines. They leased the machines rather than selling them. Designers of machines acquired long helped their users understand and repair them, and CTR's technical support was especially good.Because of machines such as this, new ways of speaking with these machines were invented, and new types of machines were developed, and eventually the computer as we know it was created.

Analog and Digital Computers
Inside the first 50 % of the 20th century, scientists started using computers, mostly because scientists possessed a great deal of math to determine and wished to spend more of their time thinking about knowledge questions rather than spending hours adding numbers alongside one another. For example, if they had to start a rocket ship, they had a need to do a great deal of math to be sure the rocket performed right. So they come up with computers. These analog computer systems used analog circuits, which made them very hard to program. Inside the 1930s, they created digital personal computers, and soon made them simpler to program. However this is not the case as many consecutive endeavors have been designed to bring arithmetic logic to l3.Analogue computer systems are mechanical or gadgets which solve problems. some are being used to regulate machines.