Input- is any data or instructionyou enter into the memoryof a computer.
4 Types of Input1. Data - unorganized facts.2. Programs - a series of instruction that tells a computer how to perform the task necessary to process data into information.
4 Types of Input3. Command - it is an instruction given to a computer program.4. User Response - a series of instruction that tells a computer how to perform.
Input Devices Keyboard Pointing Devices Scanners and Reading Devices Digital Cameras Audio and Video Input
Keyboard One of the primary input deviceson a computer is the keyboard. Youenter data into a computer bypressing the keys on the keyboard.Desktop computer keyboards usuallyhave from 101 to 105 keys, whilekeyboards for
QWERTY A Standard computer keyboardsometimes is called QWERTY keyboardbecause of the layout of its typing area.Pronounced KWER-tee, this keyboard layoutis named after the first six leftmost letters onthe top alphabetic line of the keyboard.Because of the way the keys are organized, aQWERTY keyboard might limit your typingspeed.
Dvorak A keyboard with an alternativelayout was designed to improvetyping speed. Called Dvorak keyboard(pronounced de-VOR-zhak), this typeof keyboard places the mostfrequently typed letters in the middleof the typing area.
Pointing Devices1. Mouse is the widely used pointing deviceon desktop computers because it takes fulladvantage of a graphical user interface.Designed to fit comfortable under the palmof your hand, a mouse is an input devicethat is used to control the movement of thepointer often called a mouse pointer, on thescreen and to make selections from thescreen.
Pointing Devices2. Trackball is a stationarypointing devices with a ballmechanism on its top. The ballmechanism in a larger trackball isabout the size of a Ping-Pongball; some mouse devices alsohave a small trackball about thesize of a marble.
Pointing Devices3. Touchpad or trackpad is a small,flat, rectangular pointing devicesthat is sensitive to pressure andmotion.4. Stick is a pressure-sensitivepointing device shaped like a pencileraser that was first developed byIBM for its laptop computers.
Pointing Devices5. Joystick is a vertical lever mountedon a base. Users running gamesoftware such as a driving or flightsimulator may prefer to use a joystickas their pointing device.6. Touch Screen a monitor that has atouch-sensitive panel on the screen.
Pointing Devices7. Light Pen is a handheld input devicethat contains a light source or can detectlight.8. Pen Computing the pen also called astylus looks like a ballpoint pen but usesan electronic head instead ink. Pencomputers use handwriting recognitionsoftware that translates
Pointing Devicesthe letters and symbols used inhandwriting into character data that thecomputer can use.9. Graphics Tablet also called adigitizer or digitizing tablet, consist offlat, rectangular, electronic plasticboard used to input drawings, sketches,or other graphical data.
Scanners and Reading Devices1. Optical Scanner is a light-sensing inputdevice that reads printed text and graphicsand then translates the results into a form thecomputer can use.2. Optical Reader is a device that uses a lightsource to read characters, marks, and codesand then converts them into digital data thatcan be processed by a computer.
3 Types of Optical Reader1. Optical Character Recognition(OCR) is a technology that involvesreading, typewritten, computer printed,or handwritten characters fromordinary documents and translating theimages into a form that the computercan understand.
3 Types of Optical Reader2. Optical Mark Recognition (OMR)devices are hand - drawn marks suchas small circles or rectangles.3.Bar Code Scanners uses laser beamsto read to bar codes.
Digital CamerasAllows you to take pictures and store thephotographed images digitally instead ofon traditional film. 3 Types of Digital Cameras 1. Studio Cameras 2. Field Cameras 3. Point-and-Shoot Cameras
3 Types of Digital Cameras1. Studio Cameras is the most expensive and highest quality, and used for professional studio work.2. Field Cameras Often used by photojournalists and quite expensive, is a portable camera that has many lenses and other attachments.
3 Types of Digital Cameras3. Point-and-Shoot Cameras is more affordable and lightweight and provides acceptable quality photographic images for the home or small business user.
Audio and Video InputAudio Input is the process ofentering (recording) music,speech, or sound effects.Speech Recognition is thecomputer’s capability ofdistinguishing spoken words.
Audio and Video Input Video Input is the process of entering a full-motion recording into a computer and storing the video on a hard disk or some other medium.Videoconferencing is a meeting betweentwo or more geographically separatedindividuals who use a network or theInternet to transmit audio and video data.
The End…Prepare for a Quiznext meeting… GoodLuck!
A particular slide catching your eye?
Clipping is a handy way to collect important slides you want to go back to later.