1. Computer Systems
NOTES:

2. Where do you start? - Software
Operating Systems
Word-processing
Spreadsheeting
Internet
Games
Databases
Graphics
Programming
NOTES:

3. Software
Software - set of electronic instructions that tell a computer what to do.
Operating system software: Coordinates the functions of all the computer input and output devices, controls the processing and transfer of data in the computer.
I.e. Windows 8, Windows 10, XP, Mac O/S, Linux

4. Applications software.
Application software is designed to allow users to perform a specific task such as calculate numbers, enter text, or design music.
MS Word, Excel, PowerPoint, Adobe Photoshop, Google Earth, Games, Internet browsers, Video software

5. Computer Formats
Chrome books
Laptops
Desktops

6. Basic Hardware Componets
Microprocessor - CPU/clock
Ram/Rom Memory
Hard Drive
DVD-R/RW/Blue ray
Monitor
Fax-Modem
Mouse
Keyboard
Printer
NOTES:

7. Computer Hardware Functions
Input Devices
Memory
RAM
ROM
Central
Processing
Unit
Secondary
Storage
Devices
Output Devices

8. MICROPROCESSOR/CLOCK
The micro chip Controls input, output, storage, processing
Most Chips are either “Intel” or “AMD” design
Clock speeds measured in Giga Hertz (Ghz).
Ranges from 1.5 to 4Ghz.
Graphics and communication require greater speeds.
Cache memory - stores recently used data or instructions
NOTES:

9. RAM MEMORY ALL Programs are loaded into RAM to function on a computer.
Measured in Gigabytes GB.
Basic is 4GB to 16GB
Programs will run slowly or not run at all if you do not have enough memory.
NOTES:

10. ROM Memory Permanent storage of system software.
Designed by the manufacturer.
ROM memory cannot be modified or erased by the user.

11. HARD DRIVE - Storage Device
Main Storage device in the computer.
Measured in Giga bytes - GB.
Fastest accessing time of any drive.
Basic ranges from 750GB to 3TB.
NOTES:

12. Optical Drives -DVD/Blueray
Stores programs/files, play videos. Writeable drives available
DVDs MB to 4.7 GB.
Speed range is ?x to dual layer Superdrives.
Blueray - 4.7GB to 25GB
NOTES:

13. MONITORS - Output Device
Standard type is 15” to 17” Flat Panel
Video Cards come with Ram memory from 1GB to 3GB.
ie. Radeon and GeForce
NOTES:

14. FAX-MODEM Output Devices
Use for communication on any telephone line, cable or wireless.
Ranges from dial up to high speed.
Ethernet cable connection
Speed is affected by line used and traffic on the line
NOTES:

15. Voice/Video Communication
Voice input and output available.
Transfers in Bits Per Second (BPS).
Higher transfer better quality.
Wireless/Bluetooth options
NOTES:

16. Computer Ports
USB Ports - allows connection to various input, output and storage devices (number of ports vary)
HDMI ports – higher quality connection to monitors, stereo, other devices (Usually one)
Card Reader port – used for various memory cards (SD cards) from cameras
NOTES:

17. Desk jets (All in one) Printers - Output
Black & white or colour.
Copies, Scans, prints, faxes
Resolution 1500 Dpi and up (Dots per Inch)
Ranges from 10ppm and up (pages per minute)
Excellent letter quality but graphics are not as sharp as a laser
Dedicated RAM memory
NOTES:

18. Laser (All in one) Printers
Electronically transfers images onto the paper.
Resolution is 2000 Dpi and up.
Prints 10 to 30 pages per minute.
Come with dedicated RAM memory.
NOTES:

19. Computer Hardware Accessories
MOUSE: Input Device
Used to click on words and graphics on the monitor.
Can have two to three buttons and rollers.
Wired with light sensor or wireless.
NOTES:

20. Computer Hardware Accessories
Keyboard: Input Device
12 function keys, F1 to F12 which can perform up to 4 functions each per program
Special Keys - Ctrl, Alt, Shift,
NOTES:

21. Computer Hardware Accessories
Power bar / Surge Protector
To power and protect your system from power surges.
External Speakers with subwoofers
External Hard drives- up to 3TB in storage
NOTES:

22. Viruses / Malware
Are programs made to destroy or interfere with the functions of your computer.
You can get a virus through USB sticks, internet, or
Use anti-virus program; NORTON, McCAFEE

23. NETWORKS LAN -Local area networks
Attached through network cards and cables to access information locally or worldwide

24. Types of Networks Star Network Centralized hub (typical systems)
Each machine runs independently from the other, but hubs connect.
Ring Network
All machines arranged in a ring
Built in redundancy with dual-ring
Fibre optics and token ring
Bus Network
All machines on the same line
Difficult to repair but inexpensive to construct

25. Anatomy of a Web Site Address

26. File Management Organizing files in a logical manner using folders and file names
My Computer
Personal Directory
BTT Folder
Math Folder
English Folder
Computer Unit Folder
Network Unit Folder
Files