Reviewer

• Computer


  A machine that performs processes, calculations and operations based on instructions provided by a software or hardware program
• Application software


  Designed to help the user to perform singular or multiple related tasks
• Hardware


  • CPU
  • Monitor
  • Mouse
  • Keyboard
  • Sound card
  • Speakers
  • Motherboard
• Software


  Performs specific functions, refers to the instructions programs, data, and protocols, tells computer what to do
• Software components


  • Hard drive
  • Memory or RAM
• Peopleware


  About individual that makes hardware and software components productive
• Output devices


  • Printer
  • Monitor
• Input devices


  • Keyboard
  • Mouse
• Processing devices


  • CPU (brain of computer)
• Storage devices


  • Any hardware capable of holding information either temporarily or permanently
• Word processing unit


  Creates, edits, saves and prints documents
• ROM


  Memory chips storing permanent data and instructions
• RAM


  Random Access Memory
• Hard disks


  Data is permanently stored in
• Types of computer based on purpose


  • General purpose (designed for day to day tasks)
  • Special purpose (designed for specific or particular purposes and projects)
• Special purpose computers


  • Supercomputer
  • Workstations
  • Embedded
  • Server
• General purpose computers


  • Desktop
  • Palmtop
  • PDA
  • Tablet
  • Smartphone
  • Laptop
  • Net or notebook
• Types of computer based on size and power


  • Supercomputer
  • Mainframe
  • Minicomputers
  • Microcomputer (PC)
• Types of computer based on data handling capacity


  • Hybrid
  • Analog
  • Digital
• Generations of computers


  • 1st generation (1946-1956)
  • 2nd generation
  • 3rd generation
  • 4th generation
  • 5th generation
• Hazard


  Anything that could hurt you or other people
• Risk


  The tendency that a hazard will cause harm, injury, illness or death
• Safety


  A condition of being protected
• OSH (Occupational Safety Health)


  Legislation and policies that aim to protect the health and safety of all people at the workplace
• Types of hazards


  • Electrical
  • Mechanical
  • Biological
  • Ergonomic
  • Physical
  • Chemical
  • Psychological
• ESD (Electro static Discharged) tools


  • Anti static wrist trap
  • Anti static mat
  • Anti static spray
• Hand tools


  • Flat head screwdriver
  • Phillip screwdriver
  • Torx screwdriver
  • Hex driver
  • Needle nose pliers
  • Wire cutter
  • Tweezers
  • Part-retriever
  • Wire stripper
  • Crimper
  • Punch down tool
• Cleaning tools


  • Lint free cloth
  • Compressed air
  • Cable ties
  • Parts organizer
• Diagnostic tools


  • Multimeter
  • Loop back adapter
• Ensuring safety in workplace

  • Do not work alone
  • Always power off the computer
  • Take away any liquid food
  • Use the right tool for the right job
  • Always discharge yourself before touching any part
  • Do not use excessive force
  • Clean the area before and after
  • Hold the components on the edges
  • Properly aligned
  • Use compressed air in cleaning
• Data


  Collection of raw facts
• Information


  Collection of facts organized and processed so that they have additional value beyond the value of the individual facts
• Data processing


  An operation that performs upon raw facts (data) whether or not by automatic means, such as collection, recording, organization, storage or alternation to convert into useful information
• Processing cycle


  1. Input (data)

  2. Processing

  3. Output (data)
• Input


  A process through which data collected is transformed into a form that the computer can understand
• Data collection


  The process of gathering and measuring data, information or any variables of interest in a standardized and established manner
• Encoding data


  The process of converting raw facts into a form that is easier to put into a data processing system
• Data transmission


  The stage of sending output data to the processor and carrying it across various components
• Data communication


  The transfer and reception of data in the form of a digitized analog signal transmitted over a point-to-point or point-to-multipoint communication channel
• Process


  Transforming raw data into information by performing actual data manipulation techniques