1 ITGS - introduction System unit + Peripherals = PC System unit (CPU, memory, …) Peripherals (mouse, keyboard,…) PC main purpose: to communicate with you

2 ITGS - introduction Every PC is built around a tiny microprocessor. System unit: CPU central processor unit (microprocessor) Memory Internal & external drivers PC : System unit

3 ITGS - introduction Five common peripherals: keyboard mouse monitor display speakers printer PC: Common peripherals

4 ITGS - introduction Key (s) Delete vs Backspace Function key Ctrl (control) ex. Ctrl + S, Ctrl + O Alt (alter) Enter PC: Keyboard

5 ITGS - introduction  Social & Ethical issues Privacy  (see your mail)  Password (another person)  Pin (mobile phone)  Pin (credit card) PC: Keyboard

6 ITGS - introduction  Social & Ethical issues Integrity  (hacker see your mail)  Password (hacker use your user account) PC: Keyboard

7 ITGS - introduction Buttons Click Double click Ctrl+Drag and drop (copy) PC: Mouse

8 ITGS - introduction SYSTEM SOFTWARE Operating systems OS APPLICATION PROGRAMS- APPLICATIONS USER SOFTWARE Software

9 ITGS - introduction Match APPLICATIONS DOCUMENT with FILE what kind of files Software

10 ITGS - introduction SYSTEM SOFTWARE Operating systems OS APPLICATION PROGRAMS- APPLICATIONS FILES DOCUMENT Software

11 ITGS - introduction NAME SIZE DATE & TIME modified EXTENSION type executable files data files CONTENT File

12 ITGS - introduction Match APPLICATIONS DOCUMENT with i.OBJECT ii.SUBJECT File

13 ITGS - introduction File Match APPLICATIONS DOCUMENT with i.NAME ii.EXTENSION - type iii.SIZE iv.DATE & TIME – modified v.content explain

14 ITGS - introduction File Match WINDOWS EXPLORER with i.NAME ii.EXTENSION type iii.SIZE iv.DATE & TIME modified v.content explain

15 ITGS - introduction  Social & Ethical issues Integrity  Content (hacker change document or use document)  Name (hacker change name)  Size (hacker change document) File

16 ITGS - introduction Do all keys always respond by displaying characters on the screen:  Yes (which)  No (why) PC : FAQ

17 ITGS - introduction Does all PC use the same OS:  Yes (which)  No (why) PC : FAQ

18 ITGS - introduction Does Application Program called simply:  Application  Program  Both PC : FAQ

19 ITGS - introduction Does System Software include Operating systems OS:  Yes  No PC : FAQ

20 ITGS - introduction Application files and document files are the same kind of files:  Yes  No PC : FAQ