Input and Output Devices Essay Example

Input and Output Devices Essay 1. Keyboards:Ad- Data can be entered quickly.- Most pcs come with a keyboard.Dis- It is easy to make mistakes when using a keyboard.- Hard to enter some data e.g. details of diagrams and pictures etc.2. Mouse:Ad- It is easier to move stuff around with a mouse than using the arrow keys on the keyboard.- Generally easy to use.- Its often faster to use a mouse of getting the tasks you want to start.Dis- They can stop functioning correctly if not cleaned and looked after properly.- People new to pcs can find it difficult to control the pointer on the monitor.3. Touchpad:A touchpad has all the same advantages as a mouse except it doesnt have the problem of getting dirty.4. Joystick:Ad- Games often take input from a joystick.- There is an immediate feel of direction due to the movement of the stickDis- There not particularly strong and can break.- Can be hard to use and some other methods are preferred5. Digital Camera:Ad- there is no expensive developing costs.- You can edit, enhance or e nlarge the pictures.- Dis- they are generally more expensive than ordinary cameras.- There not as convenient.6. Scanner:Ad- Any image can be converted from paper into digital format and later enhanced and used in other computer documents.Dis- Images can take up a lot of memory space.7. Magnetic stripe reader:Ad- Magnetic strips are built into many plastic cards such as cheque guarantee cards, cash-point cards and personal identity cards.- The magnetic strip on the back of the card can hold the personal details of the card owner and, with the necessary PIN, will allow access to secure information e.g. bank account details. Data stored on the strip is scanned and input into a computer system by a reader.Dis- they can get damaged.- Ordinary equipment can read but not change the data.8. Microphone:Ad- you can add your own recordings to presentations or emails etc.- People with a range of disabilities can use it for voice recognition and many appliances that can be used by voice control. Dis- it can become distorted when background noise is present.- Sound sampling often produces very large data files.8. MIDI:Ad- you can have a wide range of editing tools on the pc e.g. tune speed instrument etc.- The data is very compact.Dis- a musician is required to play the instrument to input in to the pc.- The main disadvantage is that it has a limited specialist use.9. Laser printer:Ad- produces a very high quality output.- are very quiet and very fastDis- quite expensive to buy.10. Inkjet printer:Ad- is cheaper to buy, offering black and white or colour printing with reduced levels of quality and speed.Dis- they are slower than laser printers.- Can dry out if left for long.- Expensive to change cartridges11. dot-matrix printers.Ad- low running costs and are cheap to buy.- Offer a cheap reliable method of getting a second copy of a printout.Dis- They are comparatively noisy and low quality- They are slow.12. Plotter:Ad- A plotter can be used to produce high quality, accurate, A3 size or bigger drawings. They are usually used for Computer Aided Design (CAD) and Computer Aided Manufacture (CAM) applications such as printing out plans for houses or car parts.-Dis- they are slower than printers.- Often more expensive to buy than printers.- Not suitable for text although it can be produced.- limit to amount of detail.