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ICT REVISION

1. Analogue computers, these existed before digital computers guns where targeted using mechanical analogue during the war by the united states army air force.

2. Digital computers are modern computers are electronic and not mechanical. while some analogue computers are used in universities for research. Computers can follow or record a set off instructions, called a program and respond to a commands entered by a user. All computers today have a basic structure but the thing you can see differs because the actual computer has different structures. I.E, desktop PC, Laptop, Netbook.

3. Personal computers can be used at home or in schools, that we can use for basic everyday jobs such as writing a or taking videos or photos. Personal computers are often connected together in a network. we can also search the world wide web. Personal computers include, laptops, netbooks. computers, mobile phones. Personal computers also are used in business's and they can also track and handle your data.

4. Large organizations such as banks and utility companies may use mainframe computers. Mainframe computers are computers which work not as a single computer but as if there were dozens or hundreds of computers, each running there own operating systems and carrying out many tasks at once. The term mainframe is now somewhere out of date but it originally referred to the construction of mainframe computers on a set of frames.

5. Embedded computer are at the other of the scale, embedded computers systems are found in everyday devices and carry out only one or two tasks so they do not need to be as flexible as a personal computer. An embedded computer system controlling traffic lights at a road junction does not need to do anything else. Music players, mobile phones, microwave, washing machines and calculators all contain embedded systems. The components and software in these devices only have to carry out their designed function and no other: for instance a ipod only needs a software to organize and play music.

6. Hardware and software, hardware is all the physical components and software is used to program the computer system which means to create a set of instructions usually stored or saved for later use that the computer will follow.

7. Data, such as instructions and commands or information to be used for calculations is entered using the input devices, worked on ( processed ) and output so the user can see the results.