Methods of Computer Input and Output

THE FOLLOWING SECTIONS: THIS LESSON INCLUDES THE FOLLOWING SECTIONS: The Keyboard The Mouse Mouse Variations Hand Devices Alternate Input Devices Audio-Visual - Multimedia - Input Devices

What is Computer Input? Input is You use input devices to communicate with your computer

THE KEYBOARD – Standard Layout STANDARD KEYBOARD A standard computer keyboard has about _____ keys. Most keyboards use the __________ layout, named for the first ____ ______ in the _____ _____ of letters.

THE KEYBOARD – Standard Layout Most keyboards have keys arranged in six groups: _______________ ______________

THE KEYBOARD – Ergonomic Keyboards Long periods of keyboard use can cause _________ such as ______________ and ___________________. An ________________ ____________ keyboard can help you avoid injuries. You also can avoid injuries by adopting _________________ ____________ keyboarding practices.

THE KEYBOARD – How A Keyboard Works When you press a key: The keyboard controller detects the keystroke. The controller places a scan code in the keyboard buffer, indicating which key was pressed. The keyboard sends the computer an interrupt request, telling the CPU to accept the keystroke.

THE MOUSE THE MOUSE The mouse is a ___________ _______ you hold. Use the mouse to move a _________ __________on the screen. The mouse can be used to issue ________, start __________, ______ text, ______, _______, ______, and perform other types of ________ tasks.

THE MOUSE THE GRAPHICAL POINTER Use the ________ to move a graphical pointer on the screen. The graphical pointer is the ______ that ______ on the _______ . Changes _______ depending on the _______ being performed.

USING THE MOUSE INVOLVES SEVEN TECHNIQUES: THE MOUSE -- Mouse Techniques USING THE MOUSE INVOLVES SEVEN TECHNIQUES: ___ ___________ -- Move the mouse to move the on-screen pointer. 2. ______________ -- Press and release the left mouse button once. _______________ -- Press and release the left mouse button twice. ______________ -- Hold down the left mouse button as you move the pointer. ______________ -- Press and release the right mouse button. 6. ______________ -- Roll the scroll button. ______________ -- Press and release the left mouse button three times.

______________ mouse TYPES OF MICE Two or three ______________ The Mouse -- Variants of the Mouse TYPES OF MICE Two or three ______________ Optional ______________ ______________ ______________ mouse ______________ No ball, uses ______________ __________ Wireless No ______________ , RF or ______________ connection to PC

TRACKBALL The Mouse -- Variants of the Mouse A trackball is like a ______________ turned ______________ . Use your ______________ to move the ball and your ______________ to press the buttons.

TRACKPADS The Mouse -- Variants of the Mouse A track pad is a ____________ pad that provides the same functionality as a mouse. To use a track pad, you _____ your finger across its _______. Track pads provide a set of _______ that function like mouse buttons.

Integrated Pointing Devices The Mouse -- Variants of the Mouse Integrated Pointing Devices An integrated pointing device is a small _______ built into the keyboard. To use an integrated pointing device, you move the __________ . These devices provide a set of _________ that function like mouse buttons .

Alternative Input Devices –Hand Devices PENS Use an ______________ to write on the screen and choose commands. Common input devices for _________________ , like “personal digital assistants (PDAs)” and Blackberry phones, SmartBoards, ipads. Handy for ______________ or ______________ , not for inputting a lot of text. The user can point, tap, draw and write on the computer’s screen with a pen.

Alternative Input Devices –Hand Devices TOUCH SCREEN Touch-screen systems accept _______ directly through the monitor. Touch screens use _______ to detect the touch of a _______ . Touch-screen systems are useful for selecting _______ from _______ . ATM machines, cash registers, restaurants are _______ places where touch screens are used.

Alternative Input Devices – Graphics Tablet Used with a special pen called a _______ Can write or draw on a graphic tablet Turns data into _______ computer text

BAR CODE READERS Read bar codes—_______ of _______ bars. Alternative Input Devices – Optical Input Devices BAR CODE READERS Read bar codes—_______ of _______ bars. The reader emits _______ , which reflects off the bar code and into a _______ in the reader. The detector translates the code into _______ . Commonly _______ _______ in retail stores as well as _______ . Flatbed bar code readers are commonly found in _______. Courier services often use _______ readers.

Alternative Input Devices – Optical Input Devices IMAGE SCANNERS Image scanners _______ printed images for storage and/or use in a computer. A scanner shines _______ onto the image and interprets the reflection. _______ _______ _______ (OCR) software translates scanned text into an image or as an editable electronic documents.

Multimedia -- Microphones and Speech Recognition Alternative Input Devices – Audio Visual Input Devices Multimedia -- Microphones and Speech Recognition Microphones accept _______ input – the use of a microphone requires a _______ _______ in the PC. Sound cards digitize analog sound _______ and convert digital sound signals to analog _______ – text and words. With speech recognition software, you can use your microphone to _______ text, _______ programs, and _______ commands.

Alternative Input Devices – Camera and Video Input PC Video Cameras digitize _______ _______ images – movies! Digital Cameras capture _______ images. Cameras break images into _______ and store _______ about each pixel. Video images may be compressed to use _______ memory and storage space.