1. Credit: http://smkispanitiaict.blogspot.com/

2.  An operating system is the program that is loaded into the computer  coordinates all the activities among computer hardware devices. It controls the hardware in the computer, peripherals, manages memory and files.

3.  It enables the user to communicate with the computer and other software  examples of operating system are Microsoft Windows, Macintosh OS X,Linux, Unix and also DOS

5. 1. Starting a computer 2. Providing a user interface The three types of user interface are Command-Line, Menu-Driven and Graphical User Interface (GUI)

6. Command-Line Menu-Driven GUI

7. 3. Managing data and programs

8. 4. Managing memory

9. 5. Configuring Devices

10. 1. What is definition of OS? 2. List all the functions of OS.