1. Input Devices Hardware This icon indicates that detailed teacher’s notes are available in the Notes Page. This icon indicates the slide contains activities created in Flash. These activities are not editable. For more detailed instructions, see the Getting Started presentation.

2. Input devices There are a huge range of input devices on the market. These fall into two main groups: • Manual Input and • Automatic Data Capture. Manual Input include devices such as the keyboard and mouse, where the user has to put the data in by hand.

3. Automatic Data Capture devices collect the data automatically and feed it straight into a computer. Some of them are operated by people, like bar-code scanners, but some devices just collect data, such as web cams and data loggers. Automatic data capture tends to cut down on errors compared to manual data entry. It is usually quicker too – imagine how long the supermarket queue would be if every number on the bar-code had to be typed by hand. However, they tend to be moreexpensive, and so are usually used when there is a lot of data to capture.

4. Input by touch With thanks to Logitech.

5. Input by light With thanks to Evesham Technology and Worth.

6. Other input

7. Input devices all around us

8. Input devices around us

9. Summary • Input devicesfall into two main categories: manual devicesandautomatic data capture devices. • Data can be input by touch,sound,light,control,magnetismandelectronicmeans. • Input devices are being used all around us in daily life.

10. Output Devices Hardware This icon indicates the slide contains activities created in Flash. These activities are not editable. For more detailed instructions, see the Getting Started presentation.

11. Output devices When a computer has finished processing information, the information needs to be output so that it can be used. • Monitors: • screens or Visual Display Units (VDUs) • display the effects of what the user is doing • can vary in size and resolution. • Printers: • produce a paper copy of the user’s work: a ‘hard copy’ • come in three main types: laser, inkjet and dot matrix. Some businesses also use plotters. Sometimes we just need to see the information, on screen or on paper, so we use a monitor or a printer.

12. When a computer has finished processing information, the information needs to be output so that it can be used. • Speakers: • are used to output sound, whether music or voice • vary a lot in quality. • Headphones: • work in the same way as speakers • can be cordless. Sometimes we need to hear the information, so we use loudspeakers or headphones.

13. When a computer has finished processing information, the information needs to be output so that it can be used. Sometimes we want it to control something, so we send a signal to a motor or a switch that is part of another device, like a robotic arm or a computerized sewing machine.

14. Output devices – visual and printed

15. Output devices – control and sound

16. Device suitable for purpose

18. Summary • There are four kinds of output devices; devices that produce a visualorprintedoutput, those that produce an audiooutput and others that use controlas output. • The three main types of monitors at CathodeRayTube(CRT), LiquidCrystalDisplays (LCD) and Thin Film Transistor (TFT). • There are three main types of printers: dot matrix,inkjetand laser. • Sound devices include speakersandheadphones. • Control devices include hydraulics, pneumaticsandmotors.