Chapter 2 Part THREE (CGS2100)
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If you want to watch high-definition or Blu-Ray movies, you would need a resolution of at least
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1920 × 1080
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Inkjet printers?
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Spray tiny drops of ink onto page
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Laser printers?
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Use laser beams and static electricity to deliver toner to page
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Impact printers?
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have tiny hammer-like keys that strike the paper through an inked ribbon, making a mark on the paper. The most common impact printer is the dot-matrix printer. Impact printers are an example of legacy technology.
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all-in-one printer
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device that combines the functions of a printer, scanner, copier, and fax into one machine.
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plotter?
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produce oversize pictures that require the drawing of precise and continuous lines, such as maps, detailed images, and architectural plans.
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thermal printer
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works either by melting wax-based ink onto ordinary paper (a process called thermal wax transfer printing), or by burning dots onto specially coated paper (a process called direct thermal printing).
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Noimpact printers?
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Inkjet and laser
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Speed? [PRINTERS]
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Determines how many pages it can print per minute (called pages per minute, or ppm). Printing speeds range from 8 to 38 ppm for both laser and inkjet printers.
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Resolution? [PRINTERS]
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measured in dots per inch (dpi). The higher the dpi, the greater the level of detail and quality of the image. For general-purpose printing, 1,200 dpi is sufficient; for printing photos, 4,800 dpi is better.
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Color output? [PRINTERS]
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best setup is to have individual ink cartridges for each color, so you can replace only the specific color cartridge that is empty.
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Cost of consumables? [PRINTERS]
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You should investigate carefully the cost of consumables (printer cartridges and paper) for any printer you are considering purchasing.
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motherboard?
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the key circuit board holding the essential processing parts
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What is in the motherboard?
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CPU RAM Expansion cards and slots Built-in components
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Random access memory (RAM)?
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Stores instructions and data Temporary (volatile) storage Consists of several memory cards or modules
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Read-only memory (ROM)?
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Stores startup instructions Permanent storage
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Central Processing Unit (CPU)?
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Referred to as the \"brains\" of the computer Controls all functions of the computer Processes all commands and instructions Can perform billions of tasks per second
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CPU Performance Measures?
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Speed -Megahertz (MHz) -Gigahertz (GHz) Cores -Single -Dual -Quad
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Internal drive bays?
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Cannot be accessed from outside the system Are reserved for internal hard drives
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Drive bays?
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special shelves reserved for storage devices
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External drive bays?
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Can be accessed from outside the system CD or DVD drives Floppy and Zip drives (legacy technology)
