AIS160 (2-3)

• Peripheral device


  An input/output unit of a system that feeds data into and/or receives data from the central processing unit of a digital device
• A computer system has many peripheral devices that help it run smoothly and serve various purposes
• Computer peripheral devices


  • Devices you have used
• Module Objectives


  • Explain considerations when purchasing technology devices
  • Describe the characteristics and uses of input and output devices
  • Evaluate hardware
  • Prevent and troubleshoot hardware theft or failure
  • Distinguish among internal, external, and cloud-based storage
  • Describe network hardware
  • Explain the uses of cases, motherboard components, system clock, processor cooling, the arithmetic logic unit, the machine cycle, and registers
  • Discuss ways to prevent health-related injuries and disorders caused by technology use
  • Identify responsible e-waste and technology disposal techniques
• Hardware


  The device itself and its components, such as wires, cases, switches, and electronic circuits
• Components of computer hardware

  • Memory
  • Storage devices
  • CPU
  • Input and output devices
  • Communication devices
• How a computer might use virtual memory


  Figure 3-2
• Processor core


  A unit on the processor with the circuitry necessary to execute instructions
• Processors with more cores perform better
• Multi-core processor


  A processor with multiple cores
• Computer memory


  Responsible for holding data and programs as they are being processed by the CPU
• Operating system and other apps


  Require a certain amount of RAM to function properly
• When more apps run simultaneously, more RAM will be required
• Swap file/Paging file


  The area of the hard drive temporarily used to store data that cannot fit in RAM
• Using virtual memory may decrease your computer's performance
• RAM


  Temporary storage location, stored on one or more chips connected to the motherboard, volatile memory
• Motherboard


  A circuit board inside a computer that contains the microprocessor, the computer memory, and other internal devices
• ROM


  Permanent storage location, stored on a chip that contains BIOS connected to the motherboard, non-volatile memory
• Firmware


  The instructions on the ROM chip that computer manufacturers update
• Factors to consider in buying a computer

  • Platform
  • Hardware
  • Hardware specifications
  • Form factor
  • Add-on devices
• Evaluating system requirements


  • Processor requirements
  • Memory requirements
  • Storage requirements
  • Other hardware requirements
• Form factor


  The shape and size of the computer
• Types of computers


  • Desktop computers
  • All-in-one computers
  • Laptops
  • Tablets
  • Other mobile devices
• Desktop computer


  Typically consists of the system unit, monitor, keyboard, and mouse which remain in a stationary location under a desk or table
• All-in-one computer


  Has a monitor and system unit housed together
• Laptop


  A compact communicating device with input devices (keyboard, touchpad, webcam), output devices (screens, speakers), and one or more storage devices (such as a hard drive)
• Ultrathin laptops


  • Light weight and more expensive, less powerful, thin device with fewer parts, longer battery life
• Slate tablet


  Resembles a letter-sized pad and does not contain a physical keyboard
• Convertible tablet


  A tablet that has a screen on its lid and a keyboard on its base
• Scanner


  An input device that converts an existing paper image into an electronic file
• 1. D scanner


  Can scan three-dimensional objects
• Scanners can be used to scan a printed document to edit it using an app on your computer
• Printer


  Creates hard copy output on paper, film, and other media
• A printer can be linked to a computer wirelessly, over a network, or with a cable
• Types of printers


  • Inkjet printer
  • Laser printer
  • Multifunction device
  • Mobile printer
  • Plotter
  • 3-D printer
• Voice synthesizer


  Converts text to speech
• Some apps and operating systems have a built-in voice synthesizer
• Projector


  Can display output from a computer on a large surface, such as a wall or screen
• Projectors are wired or wirelessly connected to one another and display an exact replica of the computer monitor
• Before turning on your computer or device for the first time

  • All necessary components are included and free from damage
  • Read the manual to ensure you are following the setup instructions
  • Carefully unpack all components from the box and in case of laptop, charge the battery completely before use
  • Connect all components and accessories
  • Turn on the computer or device and follow all the remaining steps on the screen