Download system software

ITGS - introduction
PC main purpose: to communicate with you
System unit + Peripherals = PC
System unit (CPU, memory, …)
Peripherals (mouse, keyboard,…)
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ITGS - introduction
PC : System unit
Every PC is built around a tiny
microprocessor.
System unit:
•CPU central processor unit
(microprocessor)
•Memory
•Internal & external drivers
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ITGS - introduction
PC: Common peripherals
Five common peripherals:
•keyboard
•mouse
•monitor display
•speakers
•printer
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ITGS - introduction
PC: Keyboard
Key (s)
Delete vs Backspace
Function key
Ctrl (control) ex. Ctrl + S, Ctrl + O
Alt (alter)
Enter
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ITGS - introduction
PC: Keyboard
Social & Ethical issues
Privacy
E-mail (see your mail)
Password (another person)
Pin (mobile phone)
Pin (credit card)
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ITGS - introduction
PC: Keyboard
Social & Ethical issues
Integrity
E-mail (hacker see your mail)
Password (hacker use your user
account)
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ITGS - introduction
PC: Mouse
Buttons
Click
Double click
Double click
Ctrl+Drag and drop (copy)
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ITGS - introduction
Software
SYSTEM SOFTWARE
Operating systems OS
APPLICATION PROGRAMSAPPLICATIONS
USER SOFTWARE
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ITGS - introduction
Software
Match
• APPLICATIONS
• DOCUMENT
with
FILE
what kind of files
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ITGS - introduction
Software
SYSTEM SOFTWARE
Operating systems OS
APPLICATION PROGRAMSAPPLICATIONS
FILES
DOCUMENT
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ITGS - introduction
File
NAME
SIZE
DATE & TIME modified
EXTENSION type
executable files
data files
CONTENT
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ITGS - introduction
File
Match
• APPLICATIONS
• DOCUMENT
with
i. OBJECT
ii. SUBJECT
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ITGS - introduction
File
Match
•
APPLICATIONS
•
DOCUMENT
with
i. NAME
ii. EXTENSION - type
iii. SIZE
iv. DATE & TIME – modified
v. content
explain
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ITGS - introduction
File
Match
•
WINDOWS EXPLORER
with
i. NAME
ii. EXTENSION type
iii. SIZE
iv. DATE & TIME modified
v. content
explain
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ITGS - introduction
File
Social & Ethical issues
Integrity
Content (hacker change
document or use document)
Name (hacker change name)
Size (hacker change document)
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ITGS - introduction
PC : FAQ
Do all keys always respond by
displaying characters on the screen:
 Yes (which)
 No (why)
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ITGS - introduction
PC : FAQ
Does all PC use the same OS:
 Yes (which)
 No (why)
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ITGS - introduction
PC : FAQ
Does Application Program called
simply:
 Application
 Program
 Both
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ITGS - introduction
PC : FAQ
Does System Software include
Operating systems OS:
 Yes
 No
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ITGS - introduction
PC : FAQ
Application files and document files
are the same kind of files:
 Yes
 No
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