IUPUI BUS-K201 IUPUI Concepts Exam 2 Chapter 6
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Character and Mark Recognition
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scanners that are able to recognize special characters and marks.
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MICR (Magnetic-ink Character recognition)
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Used by banks to automatically read those unusual marks on the bottom of checks and deposit slips.
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Optical-Character Recognition (OCR)
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Used special pre-printed characters that can be read by a light source and changed into a machine-readable code. Used in department stores to read price tags by reflecting light on the printed characters
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Optical-mark Recognition (OMR)
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Senses the presence or absence of a mark, such as a pencil mark. Used in standardized multiple choice tests.
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Ergonomics
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Comfort design, functional and user friendly.
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Keyboards
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Turn numbers and letters that people understand into electrical signals.
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Toggle Keys
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Caps Lock, Num Lock, Scroll Lock. Caps Lock, can lock all keys to stay in capital letters
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Combination Keys
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Keys used at the same time to preform a shortcut or set funtion. CTL+ALT+Delete
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Function Keys
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F1-F12 that has various command sets. ALT+F4 to close a program
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Mouse
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Controls a pointer that is displayed on the monitor.
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Resolution
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Expressed as a matrix of dots or pixels. The higher the monitors resolution the clearer the image produced.
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Dot Pitch
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The distance between each pixel. The lower the dot pitch the shorter the distance between pixels and the clearer the image is.
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Contrast Ratio
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Indicate the monitors ability to display the images. It compares the light intensity of the brightest white to the darkest black. The higher the ratio the better the monitor.
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Active Display Area
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Measured by the diagonal length of a monitors viewing area.
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Aspect Ratio
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Indicates the proportional relationship between a displays width and height. Most new monitors have a 16:9 aspect ratio to display wide screen content
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E-Readers
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Traditional books in electronic format
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E-ink
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Produces images that reflect light like ordinary paper making the display easier to read.
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Digital or Interactive Whiteboards
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devices with large displays connected to a computer or projector. Controlled using a pen or finger
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Printer Resolution/DPI
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The Higher the Dots Per Inch the better the quality of the images produced
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Printer Speed
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Measured in number of pages per minute. Typically, printers for personal use print out between 15 to 19 pages per minute per black and white.
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Printer Memory
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Within a printer is used to store printing instructions and documents waiting to be printed. The more memory the faster it will be able to print.
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Duplex Printing
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allows automatic printing on both sides of the paper.
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Ink Jet
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Spray ink at high speeds onto the surface of paper. Produces high quality images and a variety of color. Best for photos
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Laser Printing
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Laser printers use a laser beam to product images with excellent letter and graphics quality. Faster and used in more applications requiring high quality output.
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Cloud Printers
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Connected to the internet that provide printing services to others on the internet. (Walgreens)
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Thermal Printers
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Use heat elements to produce images on heat-sensitive paper. Used in ATMS and gas Pumps
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Plotter Printers
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Special Purpose printers for producing a wide rage of specialized output. Create maps and architectural drawings.
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QWERTY
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is the most common modern-day keyboard layout for Latin script
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Optical Reader/Scanner
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Accepts documents consisting of text or images and converts them to machine readable form.
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Card Reader
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Encoded information stored on a card that is encoded by the reader
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Bar Code Reader
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Contain Photoelectric cells that scan or read Bar Codes
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RFID (RadioFrequency Identification Tags)
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Tiny Chips that can be embedded in most everything. DR Licences, Passports.
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Stylus
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a computer accessory that is used to assist in navigating or providing more precision when using touchscreens.
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Voice Over IP
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the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet.
