1. mazharjaved2001@yahoo.com1 Chapter # 34 INPUT of system

2. mazharjaved2001@yahoo.com2 Input Devices The data or instructions you type into the computer are called input The data or instructions you type into the computer are called input Input devices used to get data into a system. Input devices used to get data into a system. Get data into a system as accurately, least amount of time. Get data into a system as accurately, least amount of time. It’s a cheap device. It’s a cheap device.

3. mazharjaved2001@yahoo.com3 Examples of Input Devices Keyboard Keyboard Mouse Mouse Tracker ball Tracker ball Touch sensitive pad Touch sensitive pad Joystick Joystick Light pen Light pen Touch screen Touch screen Graphics tablets Graphics tablets Magnetic Strip Reader Magnetic Strip Reader Bar Code reader Bar Code reader Digital cameras Digital cameras Web Cameras Web Cameras OCR OCR MICR MICR OMR OMR Punched Card Punched Card Kimball tag Kimball tag Voice recognition Voice recognition Microphone Microphone EPOS EPOS EFTPOS EFTPOS Video digitiser Video digitiser Scanner Scanner Touch Phone Telephone Touch Phone Telephone

4. mazharjaved2001@yahoo.com4 1.Keyboard Keyboard is the oldest and most familiar of all input devices Keyboard is the oldest and most familiar of all input devices Keyboard are intelligent devices and contain their own chips. Keyboard are intelligent devices and contain their own chips. The microprocessor scans the keyboard hundreds of second to see if a key has been pressed. The microprocessor scans the keyboard hundreds of second to see if a key has been pressed. The CPU translate that key and convert into ASCII code. The CPU translate that key and convert into ASCII code. A standard keyboard called QWERTY keyboard. A standard keyboard called QWERTY keyboard.

5. mazharjaved2001@yahoo.com5 Concept or Ergonomic Keyboard New keyboards, called concept keyboards, have been developed for ergonomics New keyboards, called concept keyboards, have been developed for ergonomics The goal of this keyboard is to provide comfort and safety. The goal of this keyboard is to provide comfort and safety. The user who spends a lot of time in typing may experience repetitive injuries of wrist and hand. The user who spends a lot of time in typing may experience repetitive injuries of wrist and hand. Higher typing speeds can be achieved. Higher typing speeds can be achieved.

6. mazharjaved2001@yahoo.com6 Cordless keyboard That requires no wires That requires no wires It is also called wireless keyboards. It is also called wireless keyboards. It transmits data using wireless technology like radio waves or light waves It transmits data using wireless technology like radio waves or light waves

7. mazharjaved2001@yahoo.com7 Special keyboards These keyboards make it easy for blind users to input data into a computer These keyboards make it easy for blind users to input data into a computer There are also keyboards with large coloured keys that are easier to see. There are also keyboards with large coloured keys that are easier to see. Each key is about one inch square. Each key is about one inch square.

8. mazharjaved2001@yahoo.com8 2.Mouse That translate its movement on the desktop into digital information. That translate its movement on the desktop into digital information. Moving the mouse produces movement of cursor or the pointer on the screen. Moving the mouse produces movement of cursor or the pointer on the screen. The mouse is also provided with buttons to press. The mouse is also provided with buttons to press.

9. mazharjaved2001@yahoo.com9 Technologies Movement of ball bearing is used to produce electrical signal. Movement of ball bearing is used to produce electrical signal. Small lights under the mouse are reflected on the photoelectric cells. Small lights under the mouse are reflected on the photoelectric cells.

10. mazharjaved2001@yahoo.com10 uses To select options from a menu or form a set of icons To select options from a menu or form a set of icons To position the cursor when editing text or using a design package. To position the cursor when editing text or using a design package. To draw shapes. To draw shapes. It selects a position on the screen more quickly than is possible with a keyboard. It selects a position on the screen more quickly than is possible with a keyboard.

11. mazharjaved2001@yahoo.com11 3.Joysticks Is similar to tracker ball. Is similar to tracker ball. Is a device which enables the user to control movement on the screen by a small lever. Is a device which enables the user to control movement on the screen by a small lever. The lever can be moved in any direction. The lever can be moved in any direction. Some joysticks give more control on the screen. Some joysticks give more control on the screen.Uses Controlling objects in computer games Controlling objects in computer games Producing graphics Producing graphics Scanners in hospitals Scanners in hospitals

12. mazharjaved2001@yahoo.com12 4.Light Pen Is a pen shaped device, held in the hand which can detect the presence or absence of light Is a pen shaped device, held in the hand which can detect the presence or absence of light It is connected by the cable to a recording device or to a computer or computer terminal. It is connected by the cable to a recording device or to a computer or computer terminal. Electrical signals are sent along the cable indicating whether or not light of sufficient intensity is being sensed. Electrical signals are sent along the cable indicating whether or not light of sufficient intensity is being sensed.

13. mazharjaved2001@yahoo.com13 Uses To detect bar codes To detect bar codes To indicate a point on the screen To indicate a point on the screen It removes the need to type or write. It removes the need to type or write. It is faster than typing. It is faster than typing.Disadvantage: It can only record the presence or absence of light. It only works with software written for it.

14. mazharjaved2001@yahoo.com14 5.Graphics Tablet Is also known as digitizing or digitizing pad. Is also known as digitizing or digitizing pad. The digitize data means to convert it from analog form to digital. The digitize data means to convert it from analog form to digital. A design is put on the board and its shape is traced out with the stylus. A design is put on the board and its shape is traced out with the stylus. Electrical signals sent to the computer record the position of the stylus. Electrical signals sent to the computer record the position of the stylus. Encoding the picture into binary form Encoding the picture into binary form

15. mazharjaved2001@yahoo.com15 Uses It can be used to digitize drawings with great accuracy. It can be used to digitize drawings with great accuracy. Reproducing drawings and designs Reproducing drawings and designs Producing layouts of printed circuit boards. Producing layouts of printed circuit boards. Digitizer Maps. Digitizer Maps.

16. mazharjaved2001@yahoo.com16 6.Touch Pad /Track Pad Is a small, flat surface over which the user moves his finger. Is a small, flat surface over which the user moves his finger. The movement of the finger moves the cursor on the screen. The movement of the finger moves the cursor on the screen. A touch pad also has one or more buttons near it. A touch pad also has one or more buttons near it. These buttons like mouse buttons. These buttons like mouse buttons. Touch pads are commonly used with notebook computers Touch pads are commonly used with notebook computers

17. mazharjaved2001@yahoo.com17 Touch screen Is a video display screen that receives input from the touch of finger Is a video display screen that receives input from the touch of finger Examples Examples ATM ATM Petrol Pumps Petrol Pumps

18. mazharjaved2001@yahoo.com18 Magnetic Strip Is a short length of magnetic tape stuck on the surface of a tag, card or document. Is a short length of magnetic tape stuck on the surface of a tag, card or document. On plastic tags or cards the strip is sealed in. On plastic tags or cards the strip is sealed in. Tags with stripes identify the item they are attached to. Tags with stripes identify the item they are attached to.Examples: On credit card On credit card On bank cards On bank cards A phone Card A phone Card Cash issue Terminals Cash issue Terminals

19. mazharjaved2001@yahoo.com19 Advantages It is simple to produce. It is simple to produce. It is not easily damaged. It is not easily damaged. It stores a large no of characters. It stores a large no of characters.Disadvantages The data can be changed or erased by magnetic field. The data can be changed or erased by magnetic field.

20. mazharjaved2001@yahoo.com20 7.Barcodes Readers Is set of parallel printed lines of differing thickness, which represent a number. Is set of parallel printed lines of differing thickness, which represent a number. The number represented by the bars is also printed above or below the bar code. The number represented by the bars is also printed above or below the bar code. When bar code are used on shop goods, the number coded identifies the product and have following information When bar code are used on shop goods, the number coded identifies the product and have following information 1. Country of region 2. Manufacturer 3. An item number for the product. Examples: Used in Barcodes Used in Barcodes Library System Library System Warehouse stock Warehouse stock

21. mazharjaved2001@yahoo.com21 Advantages Printed easily Printed easily The type of item or its price does not have to be repeatedly written down or typed. The type of item or its price does not have to be repeatedly written down or typed.Disadvantages: bar codes cannot be changed and thus there are unsuitable prices. bar codes cannot be changed and thus there are unsuitable prices. Bar codes only be read by machine. Bar codes only be read by machine. Only numbers can be coded in this way. Only numbers can be coded in this way.

22. mazharjaved2001@yahoo.com22 8.Optical Card reader (OCR) Is a technology that reads typewritten, computer printed or handwritten documents. Is a technology that reads typewritten, computer printed or handwritten documents. It translate the image into a form that can be recognized by computer. It translate the image into a form that can be recognized by computer. OCR devices read printed characters using OCR font. OCR devices read printed characters using OCR font. An OCR device determines the shapes of characters y detecting patterns of light and dark. An OCR device determines the shapes of characters y detecting patterns of light and dark.

23. mazharjaved2001@yahoo.com23 Uses In department stores In department stores To scan financial documents such as company To scan financial documents such as company

24. mazharjaved2001@yahoo.com24 9.Optical Mark Recognition (OMR) It is also called mark sensing device. It is also called mark sensing device. It uses light to scan input data to convert it into electrical/digital signal. It uses light to scan input data to convert it into electrical/digital signal. The signals are then sent to the computer for further processing. The signals are then sent to the computer for further processing. Examples Examples Voting ballot Voting ballot Multiple choice answer sheet marking Multiple choice answer sheet marking Enrollment forms Enrollment forms

25. mazharjaved2001@yahoo.com25 Mark sheet (OMR)

26. mazharjaved2001@yahoo.com26 Advantages In OMR there is typing involve so errors and takes time is less In OMR there is typing involve so errors and takes time is less Reduces the cost of inputting large amount of data Reduces the cost of inputting large amount of data The method is useful when results of the test are needed very quickly The method is useful when results of the test are needed very quickly Disadvantages Disadvantages Readers are very expansive Readers are very expansive Only certain fonts are acceptable. Only certain fonts are acceptable. There is high rejection rate There is high rejection rate

27. mazharjaved2001@yahoo.com27 10.Magnetic ink character reader (MICR) Characters are printed using an ink containing iron oxide. Characters are printed using an ink containing iron oxide. As the document passes into the reader the ink is magnetized, so that the character shapes can then be recognized electrically. As the document passes into the reader the ink is magnetized, so that the character shapes can then be recognized electrically.

28. mazharjaved2001@yahoo.com28 Use It is used by banks industry for check processing. It is used by banks industry for check processing. Each check contains MICR characters at the lower left edge. Each check contains MICR characters at the lower left edge. These characters represent check number,bank number and account number These characters represent check number,bank number and account number Branch codeCheque numberAccount number

29. mazharjaved2001@yahoo.com29 Advantages Documents can still be read when folded, written on Documents can still be read when folded, written onDisadvantages Readers are very expansive Readers are very expansive Only certain fonts are acceptable. Only certain fonts are acceptable.

30. mazharjaved2001@yahoo.com30 11.Punched cards Contains holes in different positions which mean something when they are read by a reader. Contains holes in different positions which mean something when they are read by a reader. Punched cards were the main method of entering data into computers. Punched cards were the main method of entering data into computers. Example: Example: The clock card which is used to record the hours a person works so that wages can be calculated. The clock card which is used to record the hours a person works so that wages can be calculated.

31. mazharjaved2001@yahoo.com31 12.Kimball tag Kimball tags are the small cards with holes punched in them that you see attached to clothing in certain shops. Kimball tags are the small cards with holes punched in them that you see attached to clothing in certain shops. When you buy the goods, one of the tags is removed and sent for processing to a computer centre. When you buy the goods, one of the tags is removed and sent for processing to a computer centre.

32. mazharjaved2001@yahoo.com32 Advantage Stock is reordered without any writing or typing the data. Stock is reordered without any writing or typing the data. Disadvantages: Disadvantages: They are small and are easily mislaid. They are small and are easily mislaid.

33. mazharjaved2001@yahoo.com33 Voice Recognition Using a microphone human speech is coded into a sequence of electrical signals. Using a microphone human speech is coded into a sequence of electrical signals. The computer searches a set of stored patterns for the sound which has been input The computer searches a set of stored patterns for the sound which has been input It is now popular for inputting data into word processing or database packages. It is now popular for inputting data into word processing or database packages.

34. mazharjaved2001@yahoo.com34 Advantage Useful for handicapped people with limited movement Useful for handicapped people with limited movement No typing or data preparation is necessary. No typing or data preparation is necessary.Disadvantage: Few words can be recognized and the error rate is high. Few words can be recognized and the error rate is high. Not suitable in noisy places.s Not suitable in noisy places.s

35. mazharjaved2001@yahoo.com35 13.Microphone Is used for input device for a speech recognition system. Is used for input device for a speech recognition system. The voice pattern of user is then converted into instructions to the operating system or application software or text. The voice pattern of user is then converted into instructions to the operating system or application software or text. Uses as voice mail messages Uses as voice mail messages

36. mazharjaved2001@yahoo.com36 14.Electronic point of sale Terminal (EPOS) Are the cash registers which act as the terminals to a main computer system Are the cash registers which act as the terminals to a main computer system Providing customers with itemised bills. Providing customers with itemised bills. Give useful management information Give useful management information

37. mazharjaved2001@yahoo.com37 15.Electronic Fund transfer at point of sale (EFTPOS) Similar to EPOS terminal but some additional features. Similar to EPOS terminal but some additional features. They are able to transfer funds from your bank account directly to a store’s switch card called a debit card. They are able to transfer funds from your bank account directly to a store’s switch card called a debit card. Example: Example: Switch card Switch card

38. mazharjaved2001@yahoo.com38 Advantage You can use it instead of a cheque. You can use it instead of a cheque. Faster method of payment Faster method of payment Money is instantly transferred into its account. Money is instantly transferred into its account. You can also get cash back using your debit card. You can also get cash back using your debit card.Disadvantage: They may be stolen and they are said to encourage people to spend more money. They may be stolen and they are said to encourage people to spend more money.

39. mazharjaved2001@yahoo.com39 16.Video Digitizer Is the combination of hardware and Software that converts an analogue video signal into a digital signal in computer’s memory Is the combination of hardware and Software that converts an analogue video signal into a digital signal in computer’s memory Is used to convert a frame from a video sequence into a picture Is used to convert a frame from a video sequence into a picture Each frame from the video is converted using video digitiser. Each frame from the video is converted using video digitiser. It may be played back in any required sequence. It may be played back in any required sequence. Is also called image grabbing or frame grabbing Is also called image grabbing or frame grabbing Take up a lot of main memory and when stored use a large amount of disk space Take up a lot of main memory and when stored use a large amount of disk space

40. mazharjaved2001@yahoo.com40 Uses Digitiser pictures Can be printed in a magazine or document Digitiser pictures Can be printed in a magazine or document To make television adverts and to produce pop videos. To make television adverts and to produce pop videos.

41. mazharjaved2001@yahoo.com41 17.Scanner Read data or information from the source Read data or information from the source Source could be written document, a price tag, a graphics image, or photograph Source could be written document, a price tag, a graphics image, or photograph To scan text or images which manipulated in some way before being printed To scan text or images which manipulated in some way before being printed

42. mazharjaved2001@yahoo.com42 Types of Scanner Optical Scanner Optical Scanner Optical Reader Optical Reader

43. mazharjaved2001@yahoo.com43 Optical Scanner It is a light sending input device. It is a light sending input device. The scanner image depend upon resolution The scanner image depend upon resolution Image will be sharper if the scanner provides high resolution Image will be sharper if the scanner provides high resolution it provide OCR Software it provide OCR Software Different types of Optical Scanner are Different types of Optical Scanner are Flatbed Scanner Flatbed Scanner Sheetfed Scanner Sheetfed Scanner Handheld Scanner Handheld Scanner

44. mazharjaved2001@yahoo.com44 18.Digital Camera Is used to store, picture in digital form. Is used to store, picture in digital form. Store images using different ways like floppy disk, memory stick, mini CD,PC Card and micro device. Store images using different ways like floppy disk, memory stick, mini CD,PC Card and micro device. Can be connected to a computer easily through USB port. Can be connected to a computer easily through USB port. Image resolution for digital camera measured by megapixels. Image resolution for digital camera measured by megapixels. Higher resolution photo takes up more memory. Higher resolution photo takes up more memory.

45. mazharjaved2001@yahoo.com45 Advantages No film is needed No film is needed No expensive developing costs No expensive developing costs Pictures are in digital form so it can easily sent over the internet Pictures are in digital form so it can easily sent over the internet You can adjust the size of image You can adjust the size of image

46. mazharjaved2001@yahoo.com46 19.Web camera ( Web Cams) Is simply a digital camera that is used to capture still images and video images Is simply a digital camera that is used to capture still images and video images These images can then be transmitted to a computer where they are stored in graphics format These images can then be transmitted to a computer where they are stored in graphics format Pictures can be used on the websites Pictures can be used on the websites Camera placed on top the screen such a system allow video conferencing Camera placed on top the screen such a system allow video conferencing

47. mazharjaved2001@yahoo.com47 Uses Advertising Advertising Checking on children in nurseries Checking on children in nurseries Checking on the weather on the other part of the world Checking on the weather on the other part of the world

48. mazharjaved2001@yahoo.com48 20.Touch tone Telephones Having a different tone of each number when pressed key Having a different tone of each number when pressed key Using these different tones that the numbers dialed are recognized and routed to correct telephone Using these different tones that the numbers dialed are recognized and routed to correct telephone Can be used as a data entry device Can be used as a data entry device Home banking system use touch tone telephone Home banking system use touch tone telephone