• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

ICT Revision notes

Extracts from this document...


1. Computer Systems Hardware - This is any physical part of the computer. Examples: a monitor, printer, keyboard, mouse etc. Types of hardware ? Microprocessor ? it contains the CPU (Central Processing kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkUnit), which is the brain of the computer 1. it makes the computer work 2. it is an important component of any electrical device Advantages of the CPU Disadvantages of the CPU Faster frequency makes a better processor. If the user doesn?t have it, the computer won?t go. Software ? This is any internal part of the computer (you can?t see or touch it) Examples: Microsoft word Types of software ? Operating Systems Software ? controls and manages the gggggggggggggggggggggggggggggggggggggggggg computer and its components Gggggggggggggggggggggggggggggggggggggggggg? Examples: Microsoft gggggggggggggggggggggggggggggggggggggggggg Windows, Mac OS X 1. Applications Software ? computer programs that are designed ffffffffffffffffffffffffffffffffffffffffd to carry out specific tasks Ggggggggggggggggggggggggggggggggg ? Examples: Microsoft Word, iTunes The MOTHERBOARD is the main circuit board in the computer. The CPU is a computer chip that sits on the motherboard. It carries out the main processing functions in a computer. Methods of processing 1. Interactive processing ? this responds to inputs from the user 2. Multi-tasking ? when the computer is carrying out several tasks simultaneously 3. Real-time processing ? takes place immediately in response to input from the user e.g. ...read more.


? allows the user to interact directly with the computer system by typing in commands (instructions) onto the screen. 1. The user can?t just type in any kind of instruction; the computer will only react to a definite set of words. 2. E.g. in DOS (Disk Operating System) you could type in: copy c:/item.txtd 3. Example: DOS Advantages of CLI Disadvantage of CLI It can be faster than any other interface It can be confusing Needs les memory (RAM) The commands have to be precisely typed in Doesn?t use as much processing time than a CPU If the user mistypes an instruction, they will have to restart. File and Folder Organization Computers store files in folders. A folder can contain other folders called subfolders. File path ? an address that shows where the file is stored. File Extension ? shows what type of file it is. Extension File Type .doc Word processor .html Website .ppt PowerPoint .xls Spreadsheet .jpg Image File names ? avoid special characters: /?<>*%:??. 1. keep file names short 2. don?t forget a file extension. 1. Using computer systems Identifying ICT problems and solving errors Freeze ? Ctrl, Alt and Del can close down the package that is causing the freeze to occur. Having less memory on a computer with lots of packages open makes a freeze more likely. ...read more.


Two types of network: Local Area Network (LAN) ? covers a small area like one gggggggggggggggggggggggggggggggggggggggggbuilding e.g. a school or a gggggggggggggggggggggggggggggggggggggggg college Wide Area Network (WAN) ? covers a large geographical area ggggggggggggggggggggggggggggggggggggggggge.g. companies with offices gggggggggggggggggggggggggggggggggggggggggacross the world Computer System To process data Input ? data entered into the system E.g. Memory stick Output ? the action that occurs after the input has been processed. E.g. Printer Processing ? turning the input into a useful form E.g. Microsoft word Operating systems are needed in order to run application software The differences between hardware and software 1. Hardware is a physical device that you can touch. 2. Software is program code that gives the computer instructions about how to operate. Computer programs are software. 3. Hardware needs software in order to function. 4. Hardware and software work together in computers and other devices that use microprocessors. Units of memory - 1 MB is just over 1,000 KB 1. 1 GB is just over 1,000 MB 2. 1 TB is just over 1,000 GB Volatile memory ? memory that is lost when the computer is turned off Non-volatile memory ? memory that isn?t lost when the power is turned off. Input devices ? anything that gives information to a computer like: speaking - microphones Output devices ? anything that gives out information from a computer like: paper - printer * Data on files should be backed up just in case it is lost or stolen. * ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Hardware section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Hardware essays

  1. Marked by a teacher

    Johns parents decided to buy a computer which can help John with his work ...

    3 star(s)

    �549.99 DVD rewriter Postage and packaging costs are calculated according to the weight of the purchased item. �41.53 Protect confidential data Digitally sign disc Help to safeguard data against decay Prevent unwanted copying and sharing of PDF files on DVDs �39.99 Digital camera Storage media: MultiMedia Card, Optical zoom: 10x,

  2. Computer Hardware, uses, advantages and disadvantages.

    When a flash drive is plugged in to a computer, what is presented to it is a block-structured logical unit. This leads to an abstraction from the complex implementation details of the flash memory devices. During the early years of the evolution of flash drives, the devices used could not survive too many erase cycles.

  1. Choosing hardware and input devices.

    If lots of windows are open at once and they are not in its capability then the computer will slow down because the ram will be full. It is faster at processing data. It is much more expensive than the 512 MB.

  2. Choosing the best harware for my system.

    Notepad takes very little space. You cannot put pictures in notepad which makes it look bad. Microsoft access Open office base The way it works is for creating switchboard and web pages. The advantages of Microsoft access is that there are so many ways of creating a switchboard and you can choose any way you like.

  1. Free essay

    Unit 3 Course Work

    Microsoft Office Access - There are a load of packages the one that most people would know of is Microsoft Access this software would be used for customer management systems, stock control systems, payroll systems, ordering systems and so on.

  2. Discuss how hard ware and soft ware of a C.P.U (central processing unit) could ...

    2.24 NETWORK INTERFACE CARDS (NIC) These are placed in stand-alone computers to make it a terminal that can be used in a network. They plug into the main circuit board of the CPU. These cards change the form of the data into a different type to can be passed down a cable.

  1. Hardware Choices and Operating System.

    2.93GHz Intel Core Duo Processor �94.86 An Intel core duo processor runs computer programs and executes commands. Most computer programs that are processed are internet explorer, word processors and image manipulation software. An Intel core duo processor performs four basic functions to run computer programs and process data.

  2. Unit 14 Mobile communication technology

    all sometimes the maps can think you are in a different location then what you?re actually in confusing you and making you think twice whether to follow the map or not. Web browser Phones have their own web browsers which use touch screens to make it easier to use and

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work