Chapter 5: Input CSC 151 Beth Myers Kristy Heller Julia Zachok

What is Input? Input is any data or instructions entered into the memory of a computer

Forms Instructions entered into the computer can be in the form of programs, commands, and user responses Instructions entered into the computer can be in the form of programs, commands, and user responses Data consists of a collection of unprocessed text, numbers, images, audio, or video Data consists of a collection of unprocessed text, numbers, images, audio, or video

What are input devices? Any hardware component that allows users to enter data or instructions into a computer Any hardware component that allows users to enter data or instructions into a computer

Input devices Keyboard Keyboard Mouse Mouse Stylus Stylus Digital Pen Digital Pen Microphone Microphone Digital camera Digital camera Scanner Scanner

Keyboard Input device that contains keys users press to enter data into the computer Input device that contains keys users press to enter data into the computer 101 – 105 keys 101 – 105 keys Includes letters, numbers, punctuation marks, commands, toggle keys, and function keys Includes letters, numbers, punctuation marks, commands, toggle keys, and function keys

Pointing Devices An input device that allows a user to control a pointer on the screen An input device that allows a user to control a pointer on the screen  Pointer – a small symbol on the screen whose location and shape change as a user moves a pointing device Select text and graphics; move insertion point; click buttons, icons, links, and menu commands Select text and graphics; move insertion point; click buttons, icons, links, and menu commands

Mouse A pointing device that fits comfortably under the palm of your hand A pointing device that fits comfortably under the palm of your hand Types Types  Optical mouse  Mechanical mouse  Cordless mouse

Trackball A pointing device with a ball on its top and usually has one or more buttons that work as mouse buttons A pointing device with a ball on its top and usually has one or more buttons that work as mouse buttons

Touchpad A small, flat, rectangular pointing device that is sensitive to pressure and motion A small, flat, rectangular pointing device that is sensitive to pressure and motion Touchpads are usually found on laptops Touchpads are usually found on laptops

Pointing Stick A pressure sensitive pointing device shaped like a pencil eraser that is positioned between keys on a keyboard A pressure sensitive pointing device shaped like a pencil eraser that is positioned between keys on a keyboard Pointing sticks are usually found on laptops Pointing sticks are usually found on laptops

Joystick A vertical lever mounted on a base; includes buttons called triggers A vertical lever mounted on a base; includes buttons called triggers

Wheel Steering wheel type input device used to simulate driving Steering wheel type input device used to simulate driving Includes foot pedals Includes foot pedals

Light Pen A handheld input device that can detect the presence of light when pressed against the screen A handheld input device that can detect the presence of light when pressed against the screen  Usually requires a special monitor

Touch Screen A touch sensitive display device A touch sensitive display device  Used for kiosks and ATM machines  Most PDAs, Tablet Screens and some Notebook Computers have touch screens

Stylus and Digital Pen Looks like an ink pen but uses pressure to write text and draw lines Looks like an ink pen but uses pressure to write text and draw lines  Originally called an electronic pen  Some have electronic erasers and programmable buttons

Voice Input The process of entering data by speaking into a microphone The process of entering data by speaking into a microphone Voice Recognition is the computer’s capability of distinguishing spoken words Voice Recognition is the computer’s capability of distinguishing spoken words

Audio Input The process of entering any sound into the computer such as speech, music, and sound effects The process of entering any sound into the computer such as speech, music, and sound effects The users input sound via devices such as microphones, tape players, CD/DVD, players, or radios The users input sound via devices such as microphones, tape players, CD/DVD, players, or radios

PDAs/Tablet PC Personal Digital Assistant Personal Digital Assistant  Used with stylus The Tablet PC is larger in comparison and uses a digital pen The Tablet PC is larger in comparison and uses a digital pen

Smart Phones Users can send graphics, pictures, video clips, sound files, and text messages Users can send graphics, pictures, video clips, sound files, and text messages

Digital Cameras Allows users to take pictures and store the photographed images digitally instead of on traditional film Allows users to take pictures and store the photographed images digitally instead of on traditional film  Images can be immediately viewed  You can input these images onto your computer to edit and print

Video Input The process of capturing full motion images into a computer and storing them on a medium such as a hard disk or DVD The process of capturing full motion images into a computer and storing them on a medium such as a hard disk or DVD

PC Video Cameras/ Web Cams PC Video Cameras enable users to capture video and still images, send video with , add images to IM, make video telephone calls, and broadcast live on the Internet PC Video Cameras enable users to capture video and still images, send video with , add images to IM, make video telephone calls, and broadcast live on the Internet Web Cams display output on a web page Web Cams display output on a web page

Scanners Light sensing input device that reads printed text and graphics and then translates the results into a form the computer can process Light sensing input device that reads printed text and graphics and then translates the results into a form the computer can process  Four types are flatbed, pen, sheet-fed, and drum

Biometric Input Biometrics – the technology of authenticating a person’s identity by verifying the personal characteristics Biometrics – the technology of authenticating a person’s identity by verifying the personal characteristics  Fingerprints  Voice  Signatures  Eye patterns

Any questions?