Chapter 5 Input And Output Input is any data and instructions entered into the memory of a computer. Input Device is any hardware component that allows users to enter data and instructions into a computer.

Chapter 5 Input Devices Keyboard and pointing devices pointing devices: Mouse is a pointing device because it allows a user to control a pointer on the screen. In GUI, a pointer is a small symbol on the screen whose location and shape change as a user moves a pointing device. a pointing device can select text, graphics and other objects and click buttons, icons, links and menu commands.

Input Devices Categories Chapter 5 Input Devices Categories Input Devices Keyboard Cable keyboard Wireless keyboard Pointing Devices Mouse Mechanical Optical Trackball Touchpad Pointing Stick Light Pen Touch Screen Pen Input Audio Input Digital Camera Scanner and reading devices Optical Scanner Optical Reader Barcode Reader RFID reader Magnetic strip card readers MIRC reader Biometric Input Physical Behavioral

Mouse There are 2 types: mechanical mouse and Optical mouse. Chapter 5 Mouse There are 2 types: mechanical mouse and Optical mouse. Mechanical mouse has a rubber or metal ball on its underside. You should place a mechanical mouse on a mouse pad. Mouse pad is a rectangular rubber or foam pad that provides better traction than the top of a desk Optical mouse uses devices that emit and sense light to detect the mouse’s movement. Some use optical sensors; other use laser.

Chapter 5

Chapter 5

Chapter 5 Trackball Is a stationary pointing device with a ball on its top or side, Similar to a mechanical mouse that has a ball on the bottom. To move the pointer using a trackball, you rotate the ball with your thumb, fingers or the palm of your hand. It has one or more buttons that work just like mouse buttons.

Chapter 5 Touchpad Is a small, flat, rectangular pointing device that is sensitive to pressure and motion. To move the pointer, slide your fingertip across the surface of the pad. You also can tap the pad’s surface to imitate mouse operations such as clicking. Around the edge of the pad there are one or more buttons that work like mouse buttons. Touchpad's are found most often on notebook computers.

Chapter 5 Pointing Stick Is a pressure-sensitive pointing device shaped like a pencil eraser that is positioned between keys on a keyboard. To move the pointer you push the pointing stick with a finger. IBM developed the pointing stick for its notebook computers.

Chapter 5 Light Pen Is a handheld pointing device that detect the presence of light. To select objects on the screen, a user press the light pen against the surface of the screen or points the light pen at the screen and then press a button on the pen.

Chapter 5 The Keyboard Is an input device that contains keys users press to enter data and instructions into a computer. Typing area Numeric keypad Function Keys Media control buttons Internet control Desktop computer keyboard often attach to the System Unit using Cable: a serial port or USB port. Without cables :Ir or Bluetooth Wireless keyboard or cordless keyboard, is a buttery-powered device that transmits data using wireless technology

Chapter 5

Touch screen Is a touch-sensitive display device. Chapter 5 Touch screen Is a touch-sensitive display device. Users can interact with these device by touching areas of the screen. Because touch screens require a lot of arm movements, you do not enter large amounts of data using a touch screen. Many handheld game consoles have touch screens.

Chapter 5 Pen Input Mobile users often enter data and instructions with a pen-type device. With pen input ,users write, draw, and tap on a flat surface to enter input. The surface maybe a monitor, a screen, a special type of paper or graphic tablet.

Chapter 5 Audio Input Is the process of entering any sound into the computer such as speech, music, and sound effects. User enter sound into computer via devices such as microphones tape players CD/DVD players radios

They use internal flash memory to store images. Chapter 5 Other Types of Input Digital Cameras Allows users to take pictures and store the photographed image digitally instead of on traditional film. They use internal flash memory to store images. Others store images on mobile storage media, including a flash memory, memory stick and mini CD/DVD.

A digital camera's resolution is defined in pixels. Chapter 5 Digital Cameras A digital camera's resolution is defined in pixels. The greater the number of pixels the camera uses to capture an image, the better the quality of the image.

Scanners and Reading Devices Chapter 5 Scanners and Reading Devices Some input devices save time by capturing data directly from a source document. Optical scanner Optical readers Bar code readers RFID readers Magnetic strip card readers Magnetic-ink character recognition reader.

Chapter 5 1- Optical scanner Usually called a scanner Is a light-sensing input device that reads printed text and graphics and then translates the results into a form the computer can process. Many scanner include OCR ( optical character recognition ) software, which can read and convert text documents into electronic files. OCR SW converts a scanned image into a text file that can be edited.

Chapter 5 2- Optical Readers Is a device that uses a light source to read characters, marks and codes and then converts them into digital data that a computer can process. Two technologies used by optical readers are Optical character recognition. Optical mark recognition.

A- Optical character recognition (OCR) Chapter 5 A- Optical character recognition (OCR) Involves reading handwritten, typewritten or printed text and translating the image into a form the computer can process. Most OCR devices include a small optical scanner for reading characters and sophisticated SW to analyze what read. It range from large machines that can read thousands of documents per minute to handheld that read one document at a time.

B- Optical mark recognition (OMR) Chapter 5 Devices read hand-drawn marks such as small circles or rectangles. One of the most familiar applications of optical mark recognition is the use of pencil bubble optical answer sheets in multiple choice question examinations.

3- Bar Code Readers also called bar code scanner Chapter 5 3- Bar Code Readers also called bar code scanner is an electronic device that uses laser beams for reading printed barcodes. Bar code is an identification code that consists of set of vertical lines and spaces of different widths. The bar code represent the data that identifies the manufacturer and the item.

4- RFID Readers Radio-frequency identification readers Chapter 5 4- RFID Readers Radio-frequency identification readers is a technology that uses radio signals to communicate with a tag placed in or attached to an object, an animal, or a person. RFID tags, which contain a memory chip and an antenna, are available in many shapes and size. RFID reader reads information on the tag via radio waves. It can be handheld devices or mounted in a stationary object such as a doorway.

Chapter 5 RFID Readers Many retailer see RFID as an alternative to bar code identification because it dose not require direct contact or line-of-site transmission. Other uses of RFID include tracking times of runners in a marathon; tracking location of soldiers, and airline baggage.

5- Magnetic strip card readers Chapter 5 5- Magnetic strip card readers Often called a magstripe reader Reads the Magnetic strip on the back of credit cards or other similar cards. The strip contains information identifying you. Some information stored in the strip includes your name, account number, the card expiration date, and a country code. If the Magnetic strip card readers rejects your card, it is possible that the Magnetic strip is scratched, dirty or erased. Exposure to magnetic field can erase the contents of a card’s magnetic stripe.

6- MICR Reader Magnetic-ink character recognition Chapter 5 6- MICR Reader Magnetic-ink character recognition Devices read text printed with magnetized ink. MICR reader converts MIRC characters into a form the computer can process. The banking industry almost exclusively uses MICR for check processing. Bank routing no. Account no. Check no. Check amount.

Chapter 5 Biometric Input Is the technology of authenticating a person’s identity by verifying a personal characteristic. Biometric devices grant users access to programs, systems, or rooms by analyzing some physiological or behavioral characteristic. such as fingerprints, eye patterns, voice patterns, facial features, signatures and hand geometry.

Biometric Input Fingerprint scanner Face recognition system Chapter 5 Fingerprint scanner Face recognition system Hand geometry system Voice verification system Signature verification system Iris recognition system