1. Introduction to Computer Studies
Computer Concepts
Introduction to Computer Studies

2. What Is A Computer?
A computer is simply a:
"Machine"

3. What Does A Computer Do?
Computers manipulate/process data (information) very quickly according to “preset instructions”

4. Input
Computer
Storage
"B u z z"
Process
Words
Output

5. Cycle of Activity Input Computer accepts data Storage
Process
Output
Computer accepts data
Computer stores the data
Computer “manipulates” (processes / changes) data in some way
Example: Reads Data, Performs Calculations
Computer presents data “after” processing
Example: Screen Display, Printed Report

6. Computerware (Three Components)
Hardware
Physical Components of the Computer
Screen, Printer, Mouse, Keyboard, Processor
Software
Programs (ie. Set of instructions) which tells the computer “step-by-step” what to do
Word, Excel, All the Right Type, Games You Play
Operating System
Special Program that “organizes” and “stores” the computer’s software
Windows XP, Windows 2000, Windows 98, DOS

7. Input Devices Keyboard Mouse
The “SCREEN” is used with these input devices, BUT, it is not an input device.

8. Input Devices Continued
Hand-held Scanner
Computerized Cash Register
“Retail Environment”
Flat-bed Scanner

9. Input Devices Continued
Cd’s and Dvd’s
Disks
Memory Stick

10. Input Devices Continued
Cameras
Microphone

11. Input Devices move information inside the computer for “processing”

12. SubUnits of the Central Processing Unit (CPU)
Arithmetic / Logic Unit
Control Unit
Storage Unit
Performs Calculations
Makes “Decisions”
Directs Instructions into and out of the Computer
It is the “Traffic Cop”
Stores Programs and Data

13. Once information is processed, the computer presents the information back to you as “output”

14. Output Devices Screen / Terminal Printer Screen Display “Softcopy”
Paper Printout
“Hardcopy”

15. Tapes and Disks (Cd’s and Dvd’s)
More Output Devices
Tapes and Disks (Cd’s and Dvd’s)
Speakers
Burners

16. Summary of Computer Operations and Equipment
- Accepts data
Input
CPU
- Calculations - Traffic Cop Stores Info
Arithmetic / Logic Unit
Control Unit
Storage Unit
Process
- Displays Info Prints Reports -- Stores Data
Output

17. Computer Classifications and Sizes
Two popular criteria you must consider when buying a computer are:
Price
Size (Memory)
(Power and speed of the computer)
These criteria help to define a computer’s “classification”.

18. Computers: Types and Sizes
Mainframes (Maxicomputers)
Minicomputers
Microcomputers
Portable Computers (Laptop / Pocket / Notebook Computers)
Handheld Computers (Palm, Blackberry, PDA’s (Personal Digital Assistants)

19. Mainframes (Maxicomputers)
Used by the government, weather bureau, armed forces, police departments, NASA, TSE
Huge memory capacity, and very fast processing speeds
Most powerful and most expensive computer systems

20. Minicomputer Used by LARGE corporations (The Bay, TDSB, Canadian Tire)
Computers are normally “networked” throughout the organization

21. Microcomputers
Used by schools, small businesses, and at home for personal use
Also called “PC” (Personal Computer)
Does not normally require “special wiring”
The price is “affordable”
May also be “networked”. (If networked, special wiring is needed.)

22. Portable Computers
Includes “laptop”, “pocket”, and “notebook” computers
Used by “travelling” business people and university / college students

23. Handheld Computers
Includes “Palm”, “Blackberry”, “PDA’s” (Personal Digital Assistants)
Used by “travelling” business people
Due to “high costs” these computers are normally used by Management-level business people

24. Using Your Computer
All computers today have the capability of becoming sophisticated
All computers are adequate but the “application” should determine the “choice” of computer needed

25. Computers
Jobs
Success
Money
Promotion

26. Business Courses
Computer Skills and Business Knowledge will help you get a GOOD job and keep a GOOD job !!

27. Good-bye For Now