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Input, Storage, and Output Devices Input= Enables data, or instructions, to be entered in to the computer. Input device= Enables you to input data and commands into the computer. Ex: keyboard, mouse, touch screen. Output Device= enables the computer to give you the results of the processed data. Ex: monitor, printer Input Devices Keyboard=Is the most commonly used input device for entering numeric and alphabetic data into a computer. Special features: Ergonomic: A keyboard designed to provide, user with more natural, comfortable hand, wrist, and arm position. Cordless: Mouse has no cord. Security= Some come with a biometric fingerprint reader, and magnetic stripe and card reader. Pointing Device Pointing Device moves, around on a flat surface and controls the pointer on the screen. Mouse= Most commonly used pointing device for personal computer. Different Types Of Mouse 1. Optomechanical= Uses a small orb underneath the mouse. 2. Optical= Uses laser to detect the mouse movement. 3. Cordless= Does not use a cord relies on infrared or radio waves. Continue Mouse You use the mouse to accomplish the following techniques: Pointing: Placing the pointer at designated location. Clicking= Pressing and realizing the mouse button. Dragging: Pressing down the mouse button and moving the mouse while continuing to hold down the button. Right-clicking= Pressing the right mouse button. Other Input Device Touch display screen= allows you to input information on to the computer, by touching the screen, which also serves as output device. This device is commonly used in retail stores. Audio Input =Inputting voice by the use of special microphone. Voice recognition= device are used to “speak” – commands through the use of microphone. Scanners Scanners are device that can change image into electronic form that can be stored in a computer’s memory. Image scanners: Converts images to electronic form that can be stored and manipulated. Bar code scanners= reads bar line. Magnetic Scanners: Reads encoded information on the back of credit cards. The magnet code on back of the card contains encoded user’s account number. Digital Camera and Video Input Digital camera= are stored digitally and then can be transferred in to the computers memory. The images can be stored in a floppy disk, flash memory card, memory stick, and mini-disk. Video input is the process of capturing full-motion images with a type of video camera and then saving the video on a storage medium such as a hard drive, CD, or DVD. After it is saved, you can view and edit. Biometric Input Biometric is authentication technique using automated method of recognizing a person based on physiological or behavioral characteristic. Some of the more common identification techniques are finger print, face, handwriting, and voice, and looking at the retina found in the eye. Different Types of Storage Device Floppy disk, is a flat circle of iron oxide-coated plastic enclosed in a hard plastic that measures about 3 ½ inches and has a capacity to hold 1.44MB, or more data. This device is know outdated. Hard Disk, are used to store data inside the computer, although some removal hard disk can be found externally from the computer. Storage Device Magnetic Storage Device Magnetic storage device use oxide-coated plastic storage media called Mylar.A device called a an electromagnetic read/write head stores or retrieves data in circles called tracks. Tracks are numbered based on a file allocation system. More Storages Optical Storage, device use laser technology to read and write data on a silver platters. The term disk is used for optical media. CDs and DVDs are a type of optical storage media. CD0DA CD-R CD-ROM CD-RW DVD-ROM DVD-RW Solid-State Storage Media Solid-state storage, is a nonvolatile removable medium in which everything is processed electronically, and thus contains no mechanical parts. A popular solid-state storage medium is the USB Flash drive.
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