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Computer program or software a detailed set of instructions that tell the computer exactly what to do
These are six primary components |
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components of a computer
• Input devices
• Output devices and processor
• Storage devices
• Control unit
• Memory
• Arithmetic logic unit |
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Where do you find the processing
Memory and storage devices ? |
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| A board like case called a system unit |
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Input devices
Any hardware that allows you to enter data components , and user responses |
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• Mouse
• Keyboard
• Digital camera
• Scanner
• Web cam
• Microphone |
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| A input devices contains keys you press to enter data into the computer . A desktop computer usually have up to 101 to105 |
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Examples of hand held computer
stylus |
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Smart phones PDAS(personal digital assistant),and tablets pc's
A stylus is a small metal or plastic devices that looks like a ballpoint pen , but uses pressure instead of ink to write, draw , or make selections |
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| Is a pointing devices that fits comfortably under the palm of your hand . with a mouse , you control the movement of the pointer, often called the mouse pointer, on the screen and make selections from the screen. |
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| Is case that contains electronic components of the computer used to process data. |
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| Sometimes called a system board, is the main circuit board of the system unit. |
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| Also called the central processing unit or CPU interprets and carries out the basic instructions that operate |
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| Also called random access memory, or RAM, consists of electronic components that temporarily store instructions waiting to be executed by the processor, data needed by those instructions, and the results of processed data(information). |
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| Prints by striking an inked ribbon against the paper |
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| Such as ink-jet printers and laser printers form characters by means other than striking a ribbon against paper |
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| Form character or graphics by using a nozzle that sprays tiny drops of ink onto the page |
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| A high speed, high-quality nonimpact printer that computer into a beam of light that employs copier-machine technology. |
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| Is an output device that visually conveys text, graphics, and video information |
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| Is a display device that is packaged as a separate unit |
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| The most popular type of flat panel monitor, uses a liquid display crystal, similar to a digital watch, to produce images on the screen |
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| The surface of the screen of either a CRT monitor or LCD monitor is composed of individual picture elements called pixels |
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| Individual picture elements |
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| Individual picture elements |
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| Individual picture elements |
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| Is used to store instructions, data , and information when they are not being used in memory |
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| Use magnetic particles to store items such as data, instructions, and information on disk's surface |
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| is the process of dividing the disk into tracks and sectors, so the computer can locate the data, instructions, and information on disks |
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| Is a narrow recording band that forms a full circle on the surface of the disk |
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| Means you can remove the medium from one computer and carry it to another computer |
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| Also called a hard disk drive , is a storage device that contains one or more inflexible, circular platters that magnetically store data, instructions, and information |
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| is a duplicate of a file, program, or disk that you can use in case the original is lost, damaged, or destroyed |
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| Is a device that can read from and write on floppy disk |
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