Today Digital Computer world
What is is better a computer or a brain? computer can rattle through billions of sums every second and tell you the name of every king and queen that have ever lived. but the fastest supercomputer on the planet is less powerful than mouse’s brain take take a million times more space computer electronic machine we can used many different things just by changing the instruction (programs) stored in them. the first computer were little more Then gaint calculator , found had a superb memories: could Store more information much more reliable then the human brain. many peoples now use their computer as a communication tool to make friends, send emails and share, the things they like. this is a possible because Virtually all the worlds together in the giant world wide network call the internet part of computer and part human brain, the online world off the internet brings us the best of both.Digital world
Early computers
Computers are based on the calculator that simply add numbers. the first mechanical calculator appeared in the 17th century. when people found ways to make calculator atomatic. computer where born. the first electronic computer that cool be programmed different jobs was ENIAC, completed in 1946. it was a bigger than a lorry and had more than 10000 separated parts.Read Also : How to recover deleted Data for free
Difference engine
mathematician Charles Babbage( 1791- 1871) who was the first person to design a computer that work by itself. Babbage never finished the difference engine in his lifetime. but this impressive replica was built after his death
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computers are electronic machine that take in information, record it, work on it in various wait and then shows the result of what they have done. this four stages are called input, storage, processing, and output, and they are carried out by separated piece of equipment. you can input information using a keyboard, mouse, touch screen, for microphone, information is usually stored in either a hard drive or memory cheats. processing is done by the main processor chip. the result are output on the screen or spoken through loudspeaker.
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Processor cheap
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also known as microprocessor this is a complex Integrated circuit, that carried out all of the computers, main operations. the more powerful the microprocessor, the faster it can work problems.
Keyboard
most computers with their input from a typewriter keyboard, but tables have keyboard that pop up on screen Mouse mouse is moved to control a pointer on the screen. mice can be cable link or wireless
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memory cheap
modern computers often “ Flash” memory cheap instead of hard drive because they are more reliable and use less power
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Screen
ordinary ordinary computers use colour LCD screens to display their output. On a tablet computer, touch screen serves as both the input and output
Parts of computer
desktop computers has separate units for the keyboard, mouse, processor and screen. laptop have all of these things, portable unit. tablet computers squeeze the same parts into even less space by building the keyboard and mouse into the screen
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How internet works
the internet is a worldwide network that lives together virtually every computer on the planet - Well over a billion of them. which computer has its own address(ip) so that any other machine on the network can instantly send emails for message to it or receive from it
Procedure to sending and receiving Images
- Sender computer breaks photo into many Tiny digital packets
- which packet is labour with the destination address
- separated packets travel across difference route over the internet
- pieces are assembled at the end
- receiver sees the final picture as through it travelled in one piece
Packet switching
you to email a photo, it doesn't travel over the internet in one big lump. instead of it's broken into “packets” . each one is given the final IP address and Travels separately. e this makes data stream across the internet very efficiently
Supercomputer
some scientific problems are so huge and complex that an ordinary home computer might take years to solve them. for intricate problems search at weather forecasting, we need more powerful computers that work a different way. some of them have tens of thousands of processor on working on a problem at once
How supercomputer work
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most giant Super computer system called parallel processing where problems are broken up into small bits and Trackled by separated processor Although it takes a time to break up up and reassemble the problem,, overall all it's must faster to work this way
- Complex problems if enter into supercomputer
- computer breaks problems into smaller some problems
- processor works on one of the smaller problem
- it's the problem is finish of separately
- computer sports result back together
- final result appears much faster
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