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Definition
Your personal computer is a programmable electronic device designed to allow data, perform approved mathematical and reasonable operations at high speed, and display the results of the procedures, all under the control of software. Mainframes, desktop and laptops, tablets and smartphones are some of the different types of personal computers. An electronic machine which helps in solving problems quickly and easily. It solves problems regarding to instructions directed at it by the computer end user called programs or software. It is an electronic machine(that uses binary digits) found in all field

Automation
Most humans have trouble with math. To show this, try doing 584 x 3,220 in your mind. It is hard to keep in mind all the steps! People made tools to help them bear in mind where they were in a math problem. The other problem people have is that they have to do the same problem over and over and over again. A cashier needed to make change every day in her brain or with a piece of paper. That required lots of time and made errors. So, people made calculators that does those same things again and again. This part of computer background is called the "history of robotic calculation," which is a fancy expression for "the history of machines which make it easy for me to do this same maths problem again and again without making mistakes."The abacus, the glide rule, the astrolabe and the Antikythera system (which dates from about 150-100 BC) are examples of automated computation machines.

Programming
People do not want a machine that would do the same thing over and over again. For example, a music box is a machine that performs the same music over and over again. Some people wanted to be able to tell their machine to do various things. For instance, they wished to tell the music pack to learn different music each and every time. They wished to be able to program the music package- to order the music container to try out different music. This part of computer record is called the "history of programmable machines" which is a fancy term for "The annals of machines that I could order to do various things if I learn how to speak their vocabulary."Among the first examples of this is built by Hero of Alexandria (c. 10-70 Advertising). He built a mechanical theatre which performed a play lasting 10 minutes and was run by a intricate system of ropes and drums. These ropes and drums were the terms of the machine- they informed what the machine did and when. Some people argue that this is the first programmable machine.Historians disagree on which early machines are "personal computers". Many say the "castle clock", an astronomical clock invented by Al-Jazari in 1206, is the first known programmable analog computer. The distance of day and night could be adjusted every day to be able to account for 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 Middle Age groups, people in Europe thought math and engineering were more important. In 1623, Wilhelm Schickard made a mechanised calculator. Other Europeans made more calculators after him. They were not modern pcs because they could only add, subtract, and increase- you could not change what they have to make them do something 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 share his textile loom what kind of style to weave. He might use punch cards to share with the loom how to proceed, and he could change the punch credit cards, which means he could program the loom to weave the pattern he wanted. This implies the loom was programmable.Charles Babbage wanted to make a similar machine which could calculate. He called it "The Analytical Engine".[8] Because Babbage did not can pay for and always evolved his design when he had a better idea, he never built his Analytical Engine motor.As time went on, personal computers were used more. People get weary easily doing the same thing over and over. Imagine spending your daily life writing things down on index credit cards, holding them, and then needing to go see them again. The U.S. Census Bureau in 1890 possessed hundreds of men and women doing just that. It had been expensive, and studies took a long time. Then an engineer worked out steps to make machines execute a lot of the work. Herman Hollerith invented a tabulating machine that could automatically add up information that the Census bureau collected. The Computing Tabulating Recording Corporation (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 tech support was especially good.Due to machines such as this, new means of talking to these machines were developed, and new types of machines were created, and eventually the computer as we know it was born.

Analog and Digital Computers
Within the first one half of the 20th century, scientists started out using computers, mainly because scientists experienced a great deal of math to figure out and wanted to spend more of their own time thinking about science questions rather than spending hours adding numbers mutually. For example, if they had to launch a rocket dispatch, they needed to do a lot of math to ensure the rocket did the trick right. So they come up with computer systems. These analog computer systems used analog circuits, which made them very hard to program. Inside the 1930s, they invented digital personal computers, and soon made them easier to program. Financial firms false as much consecutive efforts have been made to bring arithmetic reasoning to l3.Analogue computer systems are mechanical or electronic devices which solve problems. some are used to control machines.