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Welcome students, I look forward to working with you this semester, check this site frequently for updates and assignments.

~  JON ~

Chapter 1 Notes

Chapter 2 Notes
Chapter 2 Notes/Images

Chapter 3 Notes
Chapter 4 Notes
Chapter 5 Notes
Chapter 6 Notes
Chapter 7 Notes
Chapter 8 Notes
Chapter 9 Notes
Port Identification

~ IST ~

·         Hardware components

o   System Unit

§  Tower/processing unit

·         Ram, hard drive (inturnal), Processor, Motherboard, ect

o   Peripheral Devices

§  Monitor, printer, router, mouse, scanner, ect.

·         Together the system unit and peripheral devices perform four main functions: they enable the computer to input data, process that data, and output and store the data and information.              

·         Input devices

o   Devices used to enter information or instructions into the computer

§  Keyboard

·         The QWERTY keyboard is standard on most PCs


·         Enhanced features include number, function and navigation keys.

·         Dvorak Keyboard - Puts the most commonly used keys at “home keys” Reduces distance of finger stretches


·         Specialty Keyboards: Laptops, PDAs, Wireless, Ergonomic, Gaming,  cell phone key pads


§  Mouse / pointing device

·         Rollerball mouse - Less expensive, Harder to keep clean

·         Trackball - Harder to control, Stationary on desk

·         Optical mouse, Needs no mouse pad, Doesn’t need cleaning, More expensive

·         Game pads -  Buttons and pointing devices

§  Microphone

§  Scanner

§  Digital camera, ect

·         Output devices

o   Softcopy (video, sounds, control signals)

o   Hardcopy (print)

o   Monitors

§  CRT Cathode Ray Tube 

·         Less expensive

·         Use much more space

·         Uses more energy

·         Better viewing angles

·         Uses picture tube technology

·         Screen size – Diagonal measurement of the screen (15, 17, 19, 21)

·         Resolution – Sharpness of the image determined by the number pixels that the screen can display (800 x 600, 1024 x 768, 1600 x 1200)

·         Refresh rate – Speed at which the screen is refreshed (60Hz, 75Hz) Faster rate equals less flicker.

§  LCD Liquid Crystal Display

·         More expensive

·         Uses far less space

·         More energy efficient

·         Less viewable from an angle

·         Liquid crystal sandwiched between two transparent layers form images

·         Used for notebook computers, PDAs, cellular phones, and personal computers

§  Touch-screen monitors double as both input and output devices.

§  Data projectors project a computer image to a large screen for sharing with large groups.

o   Printers

§  Impact printers

·         Dot-matrix

§  Nonimpact printers

·         Inkjet

·         Laser

·         Multifunction

§  Specialty printers

·         Plotters

·         Thermal printers

o   Sound Output

§  Headphones

§  Speakers

·         System unit

o   Box that contains the central electronic components of the computer:


§  Expansion cards

§  Power supply

§  Storage devices

o   Types of ports:

§  Serial

§  Parallel

§  VGA

§  USB

§  Connectivity

·         Ethernet

·         Modem

o   Essential electronic components used to process data

§  Power supply

§  Hard disk drive

·         Stores data and program instructions

·         Permanent (nonvolatile) storage

·         Storage capacities up to 250 GB and higher

·         Transfers data in milliseconds

§  Motherboard

§  CPU

·         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

§  Expansion cards

·         Adds functions

·         Provides new connections for peripheral devices

·         Common types:

o   Sound

o   Modem

o   Video (VGA)

o   Network (NIC)

§  Random access memory (RAM)

·         Primary storage

·         Stores instructions and data

·         Temporary (volatile) storage

·         Operates in nanoseconds

·         Ergonomics

o   Ergonomics refers to minimizing injury or discomfort while using the computer

§  Steps to follow:

·         Position monitor correctly

·         Use adjustable chair

·         Assume proper position while typing

·         Take breaks

·         Ensure adequate lighting