Student information system Wikipedia

Definition
A computer is a programmable digital camera designed to accept data, perform recommended mathematical and logical operations at high speed, and screen the results of these functions, all under the control of software. Mainframes, desktop and laptops, tablets and smartphones are a few of the various types of pcs. An electric machine which assists with solving problems efficiently. It solves problems regarding to instructions directed at it by the computer consumer 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. 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 keep in mind where they were in a mathematics problem. The other problem folks have is that they have to do the same problem again and again and over again. A cashier had to make change every day in her head or with a bit of paper. That had taken lots of time and made problems. So, people made calculators that did those same things again and again. This part of computer background is named the "history of automated calculation," which is a fancy term for "the history of machines that make it possible for me to get this done same maths problem over and over without making faults."The abacus, the slide rule, the astrolabe and the Antikythera system (which dates from about 150-100 BC) are types of automated calculation machines.

Programming
People do not want a machine that would do a similar thing again and again. For example, a music box is a machine that takes on the same music again and again. Some people wished to have the ability to inform their machine to do various things. For instance, they wished to inform the music package to experiment with different music each time. They wished to have the ability to program the music field- to order the music box to play different music. This part of computer record is called the "history of programmable machines" which is a fancy key phrase for "The history of machines that I could order to do different things if I learn how to speak their words."One of the first examples of this was built by Hero of Alexandria (c. 10-70 Advertising). He built a mechanical movie theater which performed a play enduring 10 minutes and was controlled by a intricate system of ropes and drums. These ropes and drums were the terms of the machine- they told what the device did so when. Some people argue that this is the first programmable machine.Historians disagree which early on machines are "personal computers". Many say the "castle clock", an astronomical clock created by Al-Jazari in 1206, is the first known programmable analog computer. The length of day and night could be modified every day to be able to take into account the changing lengths of night and day over summer and winter. Some count number this daily adjustment as education.Others say the first computer was made by Charles Babbage. Ada Lovelace is known as to be the first programmer.

The Processing Era
By the end of the Middle Age groups, people in Europe thought mathematics and executive were more important. In 1623, Wilhelm Schickard made a mechanical calculator. Other Europeans made more calculators after him. They were not modern personal computers because they could only add, subtract, and multiply- you cannot change what they performed to make sure they are do something like play Tetris. As a result of this, we say they were not programmable. Now designers use computers to create and plan.In 1801, Joseph Marie Jacquard used punched paper cards to see his textile loom the type of structure to weave. He might use punch cards to share the loom what to do, and he could change the punch credit cards, this means he could program the loom to weave the structure he wanted. This means the loom was programmable.Charles Babbage wanted to make an identical machine that can calculate. He called it "The Analytical Engine".[8] Because Babbage didn't can pay for and always evolved his design when he had an improved idea, he never built his Analytical Engine motor.As time continued, personal computers were used more. People get weary easily doing a similar thing again and again. Imagine spending your life writng down things on index cards, holding them, and then having to go find them again. The U.S. Census Bureau in 1890 got hundreds of people doing that. It had been expensive, and information took quite a while. Then an engineer exercised how to make machines do a lot of the task. Herman Hollerith created a tabulating machine that would automatically add up information that the Census bureau gathered. The Computing Tabulating Recording Company (which later became IBM) made his machines. They leased the machines rather than selling them. Creators of machines possessed long helped their users understand and repair them, and CTR's tech support was especially good.Due to machines such as this, new ways of speaking with these machines were invented, and new types of machines were invented, and finally the computer as we know it was born.

Analog and Digital Computers
In the first 50 percent of the 20th hundred years, scientists started using computers, largely because scientists experienced a whole lot of math to determine and wanted to spend more of their time thinking about knowledge questions rather than spending hours adding numbers mutually. For example, if indeed they had to launch a rocket dispatch, they needed to do a great deal of math to be sure the rocket functioned right. So they put together computers. These analog computers used analog circuits, which made them very hard to program. Within the 1930s, they invented digital computer systems, and soon made them easier to program. However this is false as many consecutive makes an attempt have been made to bring arithmetic logic to l3.Analogue personal computers are mechanised or gadgets which solve problems. some are used to regulate machines.